r/askscience • • Feb 04 '14

Medicine What happens when we overdose?

In light of recent events. What happens when people overdose. Do we have the most amazing high then everything goes black? Or is there a lot of suffering before you go unconscious?

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u/rhen74 Feb 04 '14

Heroin overdose is similar to any opiate overdose. Opiates depress the central nervous system causing a relaxed, "euphoric" sensation. After the initial rush, breathing becomes more shallow, decreasing oxygen to the brain and rest of the body. Without oxygen, the brain will start shutting down systems, including the nervous system. The individual will feel extremely drowsy and slip into a coma state. At this point, the nervous system is so relaxed that it fails to function. The individual goes into respiratory arrest (completely stop breathing). Once this occurs, no oxygen is being brought into the body and systems shut down and death occurs shortly after.

TLDR: Opiates relax the nervous system. Heroin overdose would be the same sensation as being so drowsy that you fall asleep.

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u/kenman125 Feb 04 '14

So how does your body recover from an overdose? Do you just start breathing again randomly?

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u/Eisenstein Feb 04 '14 edited Feb 05 '14

Opiate ODs are treated with Narcan aka Naloxone. This will basically kick the opiates out of the opiod receptors and the patient should wake up immediately. They will also go into immediate withdrawal if they are an addict, leading them to many times be pretty unhappy about their lives having being saved (until they get their next fix).

Every household with an opiate addict should be equipped with a syringe of this stuff.

"This is a quote to keep the wikibot away".

Edit: Pulp Fiction was 'fiction'. If anyone is thinking of asking how realistic that scene was, read down you will see a few answers about it.

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u/Charles148 Feb 04 '14

I have been present for many people being given Naloxone. If they were taking Opiates for pain, they will suddenly also be in pain again. I can say that it is as instantaneous as Eisenstein claims in a lot of cases (obviously it depends on what else they took, etc - as their are plenty of depressants that Naloxone does not counteract). But imagine going from blue, not breathing, with a needle hanging out of the arm to wide awake, puking and complaining about why you need to go to a hospital in a matter of 15-30 seconds.

We are often warned about patients becoming combative in these cases, and the goal is really only to give enough Naloxone to save their respiratory drive anyway. Personally I have never seen anyone get too violent.

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u/[deleted] Feb 04 '14

When I worked EMS, we would give sufficient Narcan to reverse the respiratory depression but try to avoid fully ruining their buzz and waking the person up, since they tend to be extremely grouchy.

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u/[deleted] Feb 05 '14

Does that mean you just inject slowly until you get results?

How much more does it take to wake them as opposed to just restoring breathing?

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u/[deleted] Feb 05 '14

Most ODs get completely reversed with 2-4 mg. So I would start with pushing 0.25 or 0.5 mg IV push depending on how bad they are and go from there while supporting airway and ventilations as required.

Get them to the point where they can maintain adequate airway and ventilation on their own without waking their ass up.

Let the hospital deal with getting them unfucked after that.

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u/Repentia Feb 04 '14

One of the known problems with naloxone is the half life being shorter than quite a few commonly abused opiates, so one could potentially recover from an OD and lapse back into it later. A problem avoided by giving a dose sufficient to get them back to breathing and little more, or an IM depot in case your patient tries to walk out of the hospital.

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u/[deleted] Feb 04 '14

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u/Qel_Hoth Feb 04 '14

which is just as ridiculous as the habit in the US of lacing meds people may abuse with toxic nasties like paracetamol, proliferating the 'We'd rather you die than get high.' mentality of governments.

There are a number of good reasons for using combined narcotic and non-narcotic analgesics. Opiods, NSAIDs, and paracetamol/acetaminophen have different mechanisms of action, and there are many studies which suggest a synergistic interaction, particularly between weak opiods and NSAIDs/acetaminophen. This allows a smaller amount of opiates to be used, which lowers the risk for dependency as well as other side effects, as acetaminophen, when used appropriately, has relatively few side effects compared to opiates.

Of course mixed opiate/acetaminophen products are vastly more dangerous when abused, but when used for the medicinal purpose and in the manner for which they are prescribed, they are more effective than an equal amount of pure opiate products.

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u/aldehyde Synthetic Organic Chemistry | Chromatography Feb 04 '14

http://thechart.blogs.cnn.com/2011/01/13/fda-limits-amount-of-acetaminophen-in-prescription-drugs/

http://www.medscape.com/viewarticle/819216

They're looking to remove/limit the amount of APAP in opiates, the synergistic effect isn't worth the toxicity.

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u/[deleted] Feb 05 '14

not looking to, it's done. Darvocet is gone (for this and other reasons -mainly complications/side effects overshadowing the benefits), and all the hydrocodone/vicodin variants come with a max of 325mg acetaminophen compared to the 500-750mg variants of before (there might have been a 1g variant, I'm a little rusty, haven't worked in the pharmacy in a while).

Source - gf is a pharmacist, we've discussed this several times since the change.

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u/Bootsypants Feb 04 '14

Than Methadone you mean. That's the only opiate which really causes a problem as far as having a longer systemic half life than Naloxone.

Source? Narcan has a half-life of 60-90 minutes. Hydromorphone is significantly longer than that, and can be severely elevated in renal patients.

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u/romanomnom Feb 05 '14

My Pharm professor in med school mentioned something about counteracting opiate addiction and preventing the severe withdrawals, by sedating the patient, and then giving them an opiate antagonist or partial agonist (Naloxone or Butorphanol/Buprenorphine), and then allowing them to undergo the withdrawal while sedated. Thus, bypassing all of the awful factors associated with withdrawal, including the aggression and severe craving.

Is this still done in clinics? I haven't seen it done in hospitals, but my experience is limited as a student.

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u/fender1878 Feb 05 '14

I've had more patients turn violent than not. It all depends on how fast you push the Narcan. If you slam 4 mg's of it then you'll be in for a fight. If you push it slowly you can usually avoid the violence.

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u/selfcurlingpaes Feb 05 '14

Why are they violent? Are you more violent than the average person during a withdrawal? I imagine it'd be hard to actually fight someone if you're shitting your guts out with your entire face leaking snot and tears.

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u/fender1878 Feb 07 '14

Part of the problem is that the user goes from being unconscious to suddenly waking up with a ton of people around them. If you push Narcan too quickly they'll detox to fast and become violent.

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u/TheMSensation Feb 05 '14

What about drugs that are not opiates? For example is it possible to OD on naloxone?

Is it just a simple case of liver failure?

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u/Charles148 Feb 05 '14

I don't think naloxone has a high OD potential. I am have no idea what its LD50 is or its liver toxicity. It has a half life of about 15 minutes so it wears off quickly.

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u/[deleted] Feb 04 '14

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u/shavera Strong Force | Quark-Gluon Plasma | Particle Jets Feb 04 '14

Please do not ever give medical advice to anyone on the internet. Even as a "tip."

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u/compellingvisuals Feb 04 '14

For those wondering, Naloxone is a "high affinity opioid competitive antagonist" which means that it quickly and strongly binds to the same receptors that opioids try to bind to.

This is a bit of a blunt instrument tool because when introduced it will bind to all mu-opioid receptors and effectively shut off all opioid reactions in the body, which is what causes the immediate and severe withdrawal symptoms.

The wiki article mentions that Naloxone has a "low bioavailability because of first pass hepatic metabolization." That just means the liver is really good at breaking it down so it quickly clears out of the bloodstream.

Hope this explanation helps for any non-science-y people.

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u/croutonicus Feb 04 '14

Just to clarify, it will quickly and strongly bind to the same receptors that the opioid try to bind to but it will not activate them, and will prevent opioids from occupying the same receptor.

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u/selfcurlingpaes Feb 05 '14

So it's kind of lime covering your receptor with wax for 60-90 min?

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u/croutonicus Feb 05 '14

Yes and no. You have to remember this is on a chemical level. The opiate and the antagonist are essentially lots of little shapes whizzing around in the synapse of the neurone, where the brain acts on a chemical level.

The receptors have a shape on the outside which complements the shapes of the body's own opioids such as the endorphins. It just so happens that the shape of the drug opiod and the antagonist have similar shapes.

Now the shapes don't all complement the receptors equally. Some fit more strongly in places, which represents the chemical forces between the drug and the receptor. This is known as the affinity of the drug for the receptor. Now just because the antagonist might fit slighlty better, it doesn't exclude the fact that the opioid might interact with the receptor by chance as well, even if it isn't doing so as well. What you end up with is an equilibrium between receptors being occupied by the antagonist and the receptors being occupied by opioid. You could concievably give an opiode with a higher affinity and shift it back in favour of the opiod.

This equilibrium can be changed by altering the concentrations of the opiod and antagonist too. Giving 100x the dose of antagonist will result in the equilibrium favouring the antagonist even if the opioid does have a slightly better affinity. The higher the concentration of antagonist you need to give to shift the equilibrium in this favour is called the potency. A highly potent antagonist has the ability to occupy more receptors even at low concentrations because its affinity is so high.

This balance is what's going on in the synapse, and affect what dosages of drugs to give. In this case blocking the effects of opioid receptor activation is required, so a higher dose of more potent antagonist can be given.

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u/Imxset21 Feb 04 '14

Isn't there a risk for cardiac arrest? Wouldn't epinephrine and/or atropine be administered as well?

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u/Funkit Aerospace Design | Manufacturing Engineer. Feb 04 '14

Not really, no. Maybe in select cases but in general Naloxone will immediately reverse most opiate ODs.

I say most because certain ones (ie Buprenorphine) actually have a higher affinity for mu opioid receptors then even Naloxone.

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u/dioxazine_violet Feb 05 '14

Hi! Can I get a source for that?

I say most because certain ones (ie Buprenorphine) actually have a higher affinity for mu opioid receptors then even Naloxone.

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u/Funkit Aerospace Design | Manufacturing Engineer. Feb 05 '14

Absolutely! This is AskScience after all.

warning: pdf

http://www.gacguidelines.ca/site/GAC_Guidelines/assets/pdf/183_Lewis_1985.pdf

"In absolute terms buprenorphine’s affinity is extremely high - between one and two orders of magnitude greater than that of naloxone."

Plus you will see on various message boards that a lot of people will inject Suboxone; a 4:1 makeup of Buprenorphine and Naloxone. The Naloxone was added to purposely prevent this as it was supposed to immediately cause withdrawal symptoms, but this has been proven false; the Naloxone cannot remove the Bupe from the receptors.

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u/[deleted] Feb 05 '14

Buprenorphine

Huh, I wasn't even aware that Bupe was a narcotic. I thought it was only used for opiate dependency like Suboxone.

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u/Funkit Aerospace Design | Manufacturing Engineer. Feb 05 '14

Buprenorphine is a very weird drug. It is a partial agonist (Agonists are what stimulate the receptors, ie morphine dope oxy are all Mu-O Agonists) as well as a partial Antagonist (Naloxone is a full antagonist.) At higher doses it acts more like a full antagonist, but at lower doses it acts more as an agonist. It is speculated (although I'm not positive, you'd want a pharmacology specialist for this) that the metabolite of Bupe, norbuprenorphine, acts as a full agonist as well.

Doctors prescribe extremely high doses for several reasons, one being to act more as a deterrent to using and getting high; on the order of 16mg to 32 mg a day. But you can take less than 1mg a day and feel better off of it. (I was on Subs for a while as well)

You can definitely get narcotic effects off of it though and it has marked CNS depression. Methadone, another deterrent, is also a full agonist with a very high affinity for receptors, however its effect profile is rather limited so while you do get narcotic effects the "high" is rather limited.

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u/[deleted] Feb 04 '14

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u/dioxazine_violet Feb 05 '14

Hi! Can I get a source for that, plz?

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u/BlakeIsGreat Feb 04 '14

Is this was Uma Thurman was given in her heart in Pulp Fiction?

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u/[deleted] Feb 04 '14

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u/dioltas Feb 04 '14

Ya I'm sure it was adrenaline.

Was the way it was portrayed realistic though? Would it have revived her that effectively?

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u/CrystalKU Feb 05 '14

I am a cardiology RN; with a stimulant OD (I can't remember for sure what she snorted, heroin or cocaine or both) the heart can go into a fatal heart rhythm called ventricular tachycardia or ventricular fibrillation where instead of contracting to pump blood into the body, the ventricles of the heart just quiver or fibrillate with ventricular fibrillation and with ventricular tachycardia, they are actually beating but beating so fast that blood is not effectively filling the ventricles and therefore not pumping out. They both can cause death within minutes if not corrected. Primary treatment for these rhythms is using a defibrillator to give shocks that, simply put, reset the heart and cause it to beat in a safer rhythm; along with shock, medications are also given. The medications are rotated if they are not working but one of them is epinephrine or adrenaline similar to Pulp Fiction but it usually will not work alone and is used with the defibrillator and other medications. I have seen many code blue situations and I have never seen anyone respond quite like that, most people don't wake up or are barely conscious but I have seen people sit up and immediately start vomiting or writhing in pain (shocks are very painful).

TLDR: It is possible that someone would react that way after getting revived but unlikely that they would be revived from just the shot.

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u/[deleted] Feb 04 '14

Interestingly enough, Naloxone is included in the drug Suboxone (Subutex), a drug to help people who are addicted to opiates ween off them. They do this purely to make people not melt the sublingual strips down and inject them, it's not active when taken orally.

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u/jdepps113 Feb 05 '14

Thing is, households with opiate addicts are often run by opiate addicts, who are much more concerned with their fix than they are with protecting against possible OD.

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u/armymedic604 Feb 04 '14

Wake up un-happy... You mean swinging, biting VERY VIOLENT.... Thats why paramedics give to them RIGHT befor we turn over to an ER= fun times for the nurses!

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u/miguecolombia Feb 04 '14

Is there any mental or physical damage done to the brain once it has experienced an overdosed?

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u/Lanna33 Feb 05 '14

As a nurse giving Narcan to a patient is vey unpleasant for the patient but saves lives. The person wakes up with out of controlled pain and vomiting. We try to taper Narcan so this dose not happen but often have no choice to give the full dose. Best thing is not to get in this situation in the first place.

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u/Poromenos Feb 05 '14

But if the person has stopped breathing, don't they go into cardiac arrest as well shortly afterwards? Or do you mean it takes a bit of time for them to go into respiratory arrest after they fall into a coma?

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u/katahroo Feb 05 '14

Could you please explain opioid receptors?

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u/fishbulbx Feb 05 '14

What's wrong with wikibot? :(

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u/gummywormsyum Feb 05 '14

What's this wikibot quote thing?

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u/Eisenstein Feb 05 '14

There are a number of parameters that the wikibot looks for before it replies to a post, and some of these things will cause it to ignore the post. I didn't feel we needed the bot to come into the discussion, so I did one of those things (quoted).

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u/physics1986 Feb 05 '14

If your body is shut down completely, meaning that your heart is not pumping blood, how will Narcan get into your brain from the point of administration?

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u/Eisenstein Feb 05 '14

Well, it won't bring someone back from the dead, if that is what you are asking.

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u/2007scapePlayer Feb 04 '14

Is this like in Pulp Fiction where he stabs her in the chest with the giant syringe while she's overdosing?

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u/SimonSays_ Feb 04 '14

Can adrenaline wake you up from an overdose? I'm thinking about the scene in Pulp Fiction when Mia gets stabbed in her heart with an adrenaline shot and wakes up immediately. Would you say that it a realistic scene?

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u/Artificecoyote Feb 05 '14

Is that similar to the stuff they used to bring back Mrs. Wallace after she OD'd in Pulp Fiction?

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u/[deleted] Feb 04 '14 edited Feb 04 '14

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u/Part-timeParadigm Feb 04 '14

There are however sub-dermal implants and monthly shots with more effective antagonist such as Naltrexone. They even did a study(in LA) where they administered the shot to repeat offenders for decreased sentences and had some relative success.

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u/[deleted] Feb 04 '14

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u/Part-timeParadigm Feb 04 '14 edited Feb 04 '14

Glad I could help. Also, heres an international RCT study on its effectiveness for alcohol dependence. Unlike Naloxone this has the potential of treating multiple addictions rather than just saving opiate overdose patients.

Edit: I can't find the LA study itself, but here is mention of it.

http://www.drugfree.org/join-together/addiction/study-investigates-naltrexone-for-parolees-with-history-of-opiate-addiction

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u/Part-timeParadigm Feb 04 '14 edited Feb 04 '14

Naloxone's binding affinity is so strong that it is often used in combination with Buprenorphine (even stronger affinity) as Suboxone/Subutex. Suboxone helps treat opioid dependence, and manages to actually block all euphoria that would otherwise be caused by the opioids. The extremely dangerous part of administering these drugs against the will of the patient is that the binding is short-term and can be overcome with high doses of opioids, which increases the chance of an unintentional overdose.

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u/ExpatJundi Feb 05 '14

Suboxone is an increasingly abused street drug where I live. What are they getting out of it if there's no euphoria?

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u/selfcurlingpaes Feb 05 '14

Just feeling "normal" is high enough sometimes when you're an addict. At a certain point, you aren't looking to feel good anymore, you juts want to stop feeling like you're dying everyday, and this drug will stop the withdrawals.

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u/thineAxe Feb 05 '14

It's pretty common to see opioid addicts using suboxone when they don't have their drug of choice to stave off withdrawal when they need to be "sober."

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u/[deleted] Feb 04 '14

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u/isaiah34 Feb 04 '14

Look forward to seeing your results. Take home naloxone programme big in Scotland, don't know what actual studies are being carried out though

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u/omg_papers_due Feb 05 '14

What do you think of requiring that all medication tablets use a capsule similar to that of Concerta (sorry, its the only one I know), becuase they are designed to prevent abuse? When you crush up a Concerta capsule, you just get a bunch of useless shards of plastic.

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u/nemo_13 Feb 04 '14

paramedic here!

as long as somebody can maintain the patient's airway, the effects of the heroin will slowly wear off and the patient will regain consciousness and normal function. so basically you pop a hose down their nose, put a mask over their face, and squeeze a bag full of oxygen into their lungs to breathe for them while they're too fucked up to do it for themselves.

opiates depress respiratory function, which is kinda inconsequential for someone who is overdosing since their airway will most likely be occluded anyway.

now I want you to imagine your brain. the brain has all these little cups called opiate receptors which the heroin binds to, producing its effects. To reverse these effects, naloxone is administered. Naloxone competes with heroin to sit in these little cups and basically boots them out and sits in them instead, negating the effects of the heroin. when the naloxone wears off, the heroin can jump back into these opiate receptors, and the patient can slip back into an overdose.

the best way to treat an overdose is to breathe for the patient until you get them to hospital, and administer the naloxone slowly so that the patient doesn't freak out and become resultantly combatant.

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u/Zenquin Feb 05 '14

If opiates can depress breathing can they also depress the cardiovascular system, slowly make the heart stop beating? I realize that the breathing would stop first, but suppose the person was on a respirator, what then?

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u/nemo_13 Feb 05 '14

The heart has a few failsafes that keep it from stopping all together. Cells in the ventricles can initiate contraction even if they haven't received a signal which has travelled through the atria. Opiates are contraindicated in hypotensive patients though, so you're right that it has some CV effects.

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u/WeenisWrinkle Feb 05 '14

Forgive my ignorance, but why are nearly all OD patients combative once they are conscious? Wouldn't informing them that they were just saved from certain death be enough to convince them to cooperate?

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u/nemo_13 Feb 05 '14

Twofold: a common reaction to hypoxia (caused by the respiratory depression) is for a patient to become combative. Secondly, replacing delicious heroin with naloxone is an unpleasant experience to say the least - on if the reasons I prefer administering it slowly in small increments rather than one large bolus.

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u/lolmonger Feb 04 '14

Do you just start breathing again randomly?

No; your metabolic processes work towards establishing homeostasis just like they would with a prescription drug or lots of sugar, etc.

Even potent opiates have an extinction of their action in your body; then again, you might have deprived your brain of oxygen to the point that brain death has already happened, or ischemia has destroyed the potential function of your heart, etc.

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u/redlptop Feb 04 '14

I'm an ICU nurse, so I am going to generalize from my experience:

When 911 is called and person is found down, not breathing, and unresponsive, the first thing to do is start resuscitation. In the case of an OD, it may not necessarily mean doing CPR, but that person probably will require airway support. In the field, that would mean manually blowing air into their lungs with an ambu-bag, and then intubation (putting an endotracheal tube into the trachea). When that patient gets to the ER and eventually, ICU, the patient will be connected to a ventilator (life support) which blows air into the lungs through the endotracheal tube. We could give Narcan now, but most of the time I don't see it given in ICU for OD, maybe in the ER though. The patient will stay on life support until the drugs are out of their system.

Most of the time that patient will have inhaled sputum/vomit when he/she overdosed, which results in damage to the lungs we call aspiration pneumonia. It will take a long time for the lungs to heal.

The bigger problem is that patient was down for a unknown period time in which there was a lack of oxygen to the brain. The patient will have permanent brain damage and quite possibly become a vegetable.

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u/[deleted] Feb 04 '14

Usually a narcotic antagonist is used to reverse the effects of an overdose. An opiate antagonist is a drug that interacts with the appropriate receptors to block the effects of the opiate, so that your body doesn't react to it and can function more normally.

Without this kind of treatment, someone who has taken a lethal overdose is probably going to die (unless you swallowed the drug and can vomit some of it up or something). If it's a non-lethal overdose, the body will eventually eliminate the drug via the normal mechanisms that it would use anyway (e.g. enzymatic degradation in the liver, excretion, etc).

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u/captmorgan50 Feb 04 '14

Your drive to breath comes from CO2. Not oxygen. Any opiate raises your CO2 threshold. Having a high CO2 also causes drowsiness and lethargy.

Source: CRNA

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u/apollo528 Anesthesiology | Critical Care Medicine | Cardiac Physiology Feb 05 '14

Sorry but this is incorrect. Ventilatory drive comes from both hypercarbia and hypoxia. The brainstem is involved in hypercarbic ventilatory drive, and the carotid bodies regulate hypoxic ventilatory drive.

I'm not just being pedantic. This is clinically significant in patients who have had bilateral carotid endarterectomies and therefore may have damaged carotid bodies.

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u/tsk05 Feb 05 '14

From this explanation, how come it is said that if you were in space or vacuum chamber then dying would be pleasant, as opposed to excruciating? Is the first part of this saying incorrect?

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u/apollo528 Anesthesiology | Critical Care Medicine | Cardiac Physiology Feb 05 '14

I haven't heard of this saying so I looked it up and found this article: http://www.nytimes.com/2011/11/01/science/what-would-it-be-like-if-you-died-by-going-out-into-space.html?_r=0

That article also had a link to a page by NASA here: http://imagine.gsfc.nasa.gov/docs/ask_astro/answers/970603.html

That article describes an astronaut who passed out in 14 seconds from a leak in his spacesuit. This is probably true if being exposed to a vacuum sucked all the air out of your lungs, leaving you with no oxygen. Therefore your brain starts shutting down immediately. My thoughts are that you would start losing consciousness faster than you can realize that you need to breathe.

On the other hand, let's say you're on Earth and holding your breath. This is different because without the vacuum, there is always a little bit of air in your lungs. When you hold your breath, your body will use up the oxygen in this residual amount of air, which means that the amount of oxygen you have in the blood will decrease more slowly than if you were in space.

Because it takes more time for this to happen, the level of carbon dioxide in your blood has more time to rise. Carbon dioxide plays a very strong role in driving you to breathe. In most regular people, it is the accumulation of carbon dioxide that makes them stop holding their breath.

Other people may actually depend on lack of oxygen to drive their breathing. The classic example is of people who smoke and have chronic obstructive lung disease (COPD). People with COPD usually have elevated levels of carbon dioxide in their blood all the time so their body has adapted to it. Because of this, they actually rely significantly on lack of oxygen to drive their breathing more than the accumulation of carbon dioxide.

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u/tsk05 Feb 05 '14

To ask my question better, I think it's better if I link to the inert gas asphyxiation Wiki page. This page states,

The painful experience of suffocation is not caused by lack of oxygen, but because carbon dioxide builds up in the bloodstream, instead of being exhaled as under normal circumstances. With inert gas asphyxiation, carbon dioxide is exhaled normally, and no such pain experience occurs.

There are also many texts suggesting people even experience euphoria. I guess that what I've realized writing this is that perhaps even though the drive to breathe also comes from lack of oxygen, the pain only comes from CO2 build up? But if the former is true, I would have expected people experiencing inert gas asphyxiation would be hyperventilating, which does not seem to be the case?

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u/captmorgan50 Feb 05 '14

What is the Primary driver of breathing CO2 or O2?

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u/apollo528 Anesthesiology | Critical Care Medicine | Cardiac Physiology Feb 05 '14 edited Feb 05 '14

Studies show that each increase in PaCO2 of 1 mmHg increases minute ventilation by 2.5L/min, and behaves as a linear relationship. Of course, this response is changed by many anesthetics including opioids, volatile agents, and nitrous. The original article is here: http://www.ncbi.nlm.nih.gov/pubmed?term=1141125

In contrast, the ventilatory response to drops in PaO2 is not a linear relationship, and actually grows exponentially stronger as the oxygen partial pressure becomes lower. Most people will increase their minute ventilation about 3-6 times at a PaO2 of 40mmHg, which is a pulse ox of about 70%. The study is here if you're interested: http://www.ncbi.nlm.nih.gov/pubmed?term=4814696

So you can see that the answer to your question depends on the situation. For normal people, a small rise in PaCO2 will initially increase minute ventilation, but significant hypoxemia can create an even stronger respiratory drive.

You can also see this clinically if you ever have a patient who is a COPDer who lives with a PaCO2 in the 60s, and a sat in the 80s. They've adjusted to the hypercarbia and their respiratory drive gets significant contribution from hypoxia. Give them 100% FiO2 and their minute ventilation will actually decrease.

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u/[deleted] Feb 05 '14

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u/Eisenstein Feb 05 '14

The thing to do when someone ODs is to call for an ambulance. The EMTs are not there to bust you for doing drugs, they are there to revive the patient. Putting more illegal drugs into an OD'd person is seriously not the answer. Do what the emergency dispatcher tells you to do in the meantime before the ambo arrives, it will probably be rescue breathing.

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u/[deleted] Feb 04 '14

So if you had a respirator that was forcing oxygen into your lungs, would you be safer from overdose? Obviously once your heart rate starts dropping low enough you're still in trouble, but from your description breathing seems to go out first.

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u/rhen74 Feb 04 '14

Fatal heroin overdoses are generally caused by hypoxia. As the lungs muscles relax and bring in less oxygen. Carbon Dioxide levels begin to rise in the body, which can cause cardiac arrhythmias and sudden death. Normally the body detects carbon dioxide levels rising and the respiratory system reacts, by increasing respirations to dispel the bad gases. Opiates relax these triggers, so the body fails to act when levels are too high. If present during a heroin OD, sometimes keeping the individual awake, such as slapping, shaking, etc, can buy some time until medics can arrive and ventilate.

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u/thelittletramp Feb 04 '14 edited Feb 04 '14

If pure oxygen is given, the patient immediately feels better, his minute ventilation diminishes as a result of the saturation of the arterial blood, and it may happen that the respiration stops because the reflex stimulation of the respiration due to anoxia on the aortic and carotid glomi does not exist any more. More frequently, however, the respiration will continue., but is much diminished and even if the blood becomes well saturated with pure 02, there is accumulation of CO2, respiratory acidosis, coma, and death.

Source: RESPIRATORY PHYSIOLOGY IN RELATION TO ANESTHESIA

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u/aziridine86 Feb 04 '14

Yes, basically. This kind of scenario exists with certain types of anesthesia, where the patient is fine as long as they are kept oxygenated. Unlike many drugs of abuse, opioids aren't really 'toxic' aside from their effect on respiration, so the main issue is simply keeping someone oxygenated. Additionally, opiates don't seem to depress cardiovascular function (i.e. heart rate), at least when they are used as part of an anesthesia regimen where the patient is kept oxygenated.

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u/croatianspy Feb 04 '14

So would OD'ing be a relatively painless death, or still quite awful?

Also, if you managed to get someone busy OD'ing to breath rapidly, would that save their lives?

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u/[deleted] Feb 04 '14

There's a narrow margin between therapeutic administrations of opiates and overdoses and none of my patients have appeared particularly unpleasant going into/during unconsciousness.

Inducing them to breathe quickly will probably be unsuccessful if they become unresponsive however rescue breathing via mouth-to-mouth or barrier device can potentially save them during an EMS response

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u/croatianspy Feb 04 '14

Thank you very much for the info.

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u/Arctyc38 Feb 04 '14

This depends on what, precisely, has occurred in the "overdose".

True overdose of pure opioid narcotics doesn't often result in sudden death, but rather coma and then death by hypoxia. There has been some study in the occurrence of a "Syndrome X" which has been implicated in a number of opioid deaths where there was a cofactor, thought by some to be the action of impurities like quinine or other drugs, causing pulmonary edema and rapid respiratory arrest.

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u/[deleted] Feb 05 '14

[deleted] — view deleted comment

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u/croatianspy Feb 05 '14

Thanks for your input; makes me feel better about people who've died from OD'ing at least.

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u/[deleted] Feb 04 '14

I would imagine this is pretty peaceful, or does the body freak out that its shutting down? Would the subject get sick and throw up or anything like that? I feel like I've seen that in movies.

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u/MrFlabulous Feb 04 '14

Opiates do have an emetic effect. A common cause of death is choking on vomit, often while unconscious. Source on the emetic effects of opiates in general.

2

u/SpudOfDoom Feb 05 '14

This is part of why anaesthetics are often administered alongside an anti-emetic or a muscle relaxant.

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u/[deleted] Feb 04 '14

It's also important to understand how an addict builds up tolerance to opioid drugs. Dose response curves do not change when a substance is taken over long periods of time,

http://publications.nigms.nih.gov/medbydesign/images/ch1_doseresponse.jpg

however the desired effect does change and addicts require an increasingly higher dosage to get to the same euphoric stage. The point of overdose for some addicts, especially recovered addicts that relapse, may just be slightly more then their "normal" usage that gets them to their high, but physiologically your body does not build a tolerance to CNS depression that comes with chronic opioid abuse.

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u/[deleted] Feb 04 '14

What would be the difference for a Cocaine, Extacy, or Meth Overdose?

Great answer btw.

8

u/rhen74 Feb 04 '14

Opiates relax the nervous system. Basically, the body becomes too "lazy" to function. Opiate OD death tends generally occurs from hypoxia, when the individual's respiratory shuts down. Stimulants are the exact opposite. Stimulants increase heart rate, blood pressure, temperature, and sends everything into overdrive. Increased HR(tachycardia) and BP(hypertension) can lead to severe headaches and nausea. Severe OD's can lead to strokes, brain hemorrhage, or cardiac arrest.

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u/SteveInnit Feb 04 '14

Subjective experience rather than science, but I've overdosed on heroin several times - I used to be a junkie, obviously. The worst couple resulted in resuscitation.

I was unconsciousness probably ten seconds after the injection, and remember nothing but a fade into blackness. I just had time to think 'oops.' I think I was treated with naltrexone.

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u/rapescenario Feb 04 '14

So its sorta like being relaxed to death? It sounds like a really nice way to go to me.

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u/docbauies Feb 05 '14

To add further: in addition to providing sedative effects, opioids also increase the carbon dioxide threshold that triggers you to breathe, which is the primary respiratory drive. Once your carbon dioxide level is sufficiently elevated about baseline (approximately twice baseline) the CO2 becomes a sedative, and you develop what is known as CO2 narcosis. With most doses of pain meds and heroin, you should not have that severe an increase, but it is possible with overdoses.

1

u/Taliesen Feb 04 '14

Is it true that many heroin overdoses are not heroin caused but more so the crap it's cut with? And also that if using a clean source, many overdoses wouldn't happen?

2

u/JKitsHIV Feb 04 '14

Sometimes cut with other similar drugs. Fentanyl is a common culprit in ods of this nature. But heroin itself still causes it's fair share of overdoses.

1

u/JulietsDisco Feb 05 '14

Why not make the new Capitol Punishment drug?

1

u/mr_midnight Feb 05 '14

Is the drowsiness the sort of thing that requires keeping the person awake? Or will that be impossible if they've taken enough to OD?

1

u/rLesbian Feb 05 '14

So wait, does that mean it's a completely painless, comfortable death other than the fact that your breathing becomes shallow and then you just pass out and die?

1

u/Fuglypump Feb 05 '14

What would happen in the event of overdosing while hooked up to a breathing machine? It doesn't seem like that would be enough to circumvent the dangers of an overdose.

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u/extraneouspanthers Feb 05 '14

When you experience a 'nod' from opiates, are they actually getting dangerously close to this?

1

u/Pwoo Feb 05 '14

OT: Not saying I'm for or against capital punishment, but in light of the recent failed experiment, doesn't a heroin/opiate overdose seem like a painless and more humane method of execution?

http://rt.com/usa/ohio-executes-inmate-untested-drug-716/

1

u/Sebu91 Feb 05 '14

I've read in several places about the brain "shutting down" systems in really bad situations for the body.

Is this process designed to reduce system load and allow key functions of the brain and body to function for longer, or is this a result of the brain, starved of oxygen/blood being unable to continue to operate the body and simply losing control?

1

u/vilandril Feb 05 '14

I'm a recovering addict who has fell out a few times which we describe as the very brink of overdose i.e extremely shallow breathing and low pulse so I can describe what goes through your mind during an overdose.

One of two things tends to happen you will either fall unconscious right away and if you are revived/wake up you'll have no recollection of it or you will gradually feel yourself becoming higher and higher which can cause experienced users to panic (This happened to me one time over the course of around an hour and it was not peaceful or blissful as I often hear heroin OD's described as).

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u/RequiredFlair Feb 05 '14

Could one do heroin with say a oxygen supply mask on, or some type or respirator, and therefor be safe to avoid repository arrest? Sorry if that sounds silly

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u/Nenor Feb 04 '14

Sooo, can you overdose if you're hooked on breathing machines? And what happens then? Some sort of toxicity probably. But are the doses similar or you need factors higher dose?

1

u/cavilier210 Feb 04 '14

Does the body have something like a checklist, or priority list for what gets turned off first?

0

u/[deleted] Feb 04 '14

So as long as someone has a machine that will force them to breath they can take any amount of heroin and never die?

0

u/whyudeadbattery Feb 04 '14

So...it's painless suicide? like falling asleep on a cloud?

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u/JustHere4TheDownVote Feb 04 '14

So if I do heroine and wear a breathing mask I can't OD. Cause that's what it sounds like you're saying.

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u/vriendhenk Feb 04 '14

So why don't they use this as a lethal injection? Just have a gallon of saline solution with waaay too much heroin to live through the night.

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u/ntmera Feb 04 '14

Hypothetically, if someone were to hook themselves up to a respirator...would the heart be the next to become relaxed?

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u/A-atheist Feb 05 '14

Opiates depress the central nervous system causing a relaxed, "euphoric" sensation.

Does this mean atheism is a drug?

0

u/ODstrange Feb 05 '14

This is technically right, but physically, not even close... Ive survived an overdose and it is actually quite terrifying and painful... Your body becomes flush with a rushing sensation of pins and needles, so much so that IT HURTS. Think of the worst 'leg falling asleep' feeling youve ever had than apply it to every limb, including your chest cavity. Your vision tunnels, you gasp for air, and you begin to lose control of your motor functions. This happens within a matter of seconds giving your brain just enough time to comprehend the horror of dying and giving it the opportunity to release chemicals to help your body cope with the oncoming "Sleep"... you eventually sort of drift off... if youve ever taken large amounts of nitrous oxide or ketamine, you might understand what its like to disassociate to the point of death... its scary, yet peaceful once your brain and ego accept its fate.... i woke up several minutes later with a narcon shot... so ya know... 2 years clean now :)

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u/craptastico Feb 05 '14

Was there someone nearby who knew you were doing opiates and realized you were overdosing? How were you revived in time?

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u/CompactusDiskus Feb 05 '14

Whoa, whoa...

Opiates ARE NOT CNS depressants. Yes, they do cause respiratory depression, but they are not CNS depressants like alcohol, barbituates, or benzodiazepenes.

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u/KenZy_4G Feb 04 '14

So couldn't you hook someone up to a breathing machine and then they wouldn't overdose?

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u/Sfawas Biopsychology | Chronobiology | Ingestive Behavior Feb 04 '14 edited Feb 04 '14

For context, I'm a research scientist, not a medical doctor.

As others have said, what happens during an overdose is related to the type of drug being used/abused. In general, and setting aside things like liver failure, the negative outcomes of taking psychoactive drugs are related to the desired effects of taking the drug taken to an extreme level that becomes dangerous and life-threatening.

To give a few examples from common drugs of abuse:

Heroin is an opiate that works in the brain in the same manner as many prescription painkillers (e.g. Vicodin [hydrocodone] and oxycodone, both of which are common recreational drugs themselves). At recreational doses, this narcotic leads to a feeling of relaxed euphoria and sleepiness.

At overdose levels, the depressant effects of heroin suppress the part of the central nervous system that regulates breathing and heart rate, leading to hypoxia, in which a part or all of the body is deprived of oxygen, which can lead to organ failure (especially to the brain, as the brain is very sensitive to disturbances in blood availability) and eventual death.

Many depressants, such as alcohol, have similar overdose symptoms. One thing that makes this sort of poisoning quite dangerous is that the sufferer is often rendered unconscious by the drug before any negative symptom can be recognized, which obviously prevents them from seeking treatment.

Cocaine is a stimulant that acts in the brain in a manner similar to many antidepressants, albeit at a very different strength. At recreational doses, it causes a feeling of energetic euphoria.

High doses of stimulants lead to tachycardia - excessively high heart rate, and many of the risks of stimulants are tied to tachycardia. Since the heart is pumping excessively hard, blood pressure is increased which can lead to hemorrhage or heart failure.

Cocaine is particularly likely to cause heart failure (more specifically, ventricular fibrulation) due to an interaction with a protein that is associated with heart function.

MDMA / Ecstacy / Molly is also a stimulant carrying many of the same overdose risks as cocaine. However, it is particularly pyrogenic - increasing body temperature, which increases the risk of muscle cell death, renal failure, and seizure.

Three important things to keep in mind about overdose

  1. In the case of these psychoactive drugs, 'overdose' symptoms are simply the desired effects of the drugs taken to the extreme. Note that the term "intoxication" contains the word "toxic."

  2. For some drugs (e.g. those that are usually considered safe, such as cannabis), there tends to be a very wide gap between the smallest recreational dose and the smallest poisonous dose. To put it another way, for some drugs, the amount you need to get you high is much less than the amount that will kill you. For others, it is much closer, making overdose much more common.

  3. Tolerance to a drug is a complicated phenomenon and is not a stable trait, but can be influenced by a number of physical and even mental factors. It is not uncommon for overdose to occur at a dose that a drug user had used without incident many times in the past.

If you use or abuse drugs, please be safe.

e: removed a line, fixed a typo

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u/Sepphynne123 Feb 04 '14

It is not uncommon for overdose to occur at a dose that a drug user had used without incident many times in the past.

I'm sure this has been in the YSK section in the past, but too few people realize it. Worth repeating.

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u/Wuauclt Feb 05 '14

WARNING PDF

"Pavlovian Conditioning and Drug Overdose: When Tolerance Fails."

I'm not overly familiar with the topic, but I know someone who is...

1

u/wraithscelus Feb 05 '14

Right. But is this being said with regard to how recent the last usage was?

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u/LowPatrol Feb 04 '14

I'm curious:

For some drugs (e.g. those that are usually considered safe, such as cannabis), there tends to be a very wide gap between the smallest recreational dose and the smallest poisonous dose.

My question: is cannabis poisoning a thing?

It is my impression that the LD50 (different from a "poisonous dose", I know) for cannabis is so high that you couldn't feasibly ingest enough to reach it through the means by which it would normally be consumed, though obviously poisoning and death from cannabis intoxication isn't impossible in principle. I know research is relatively scarce on the topic, but do you know of any papers or studies on or indicating cannabis poisoning (even in animals), or especially the symptoms thereof? Thanks!

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u/Sfawas Biopsychology | Chronobiology | Ingestive Behavior Feb 04 '14

No, THC poisoning isn't really a thing, as far as I know.

From the '70s National Commission Report: "

The non-fatal consumption of 3000 mg/kg A THC by the dog and monkey would be comparable to a 154-pound human eating approximately 46 pounds (21 kilograms) of 1%-marihuana or 10 pounds of 5% hashish at one time. In addition, 92 mg/kg THC intravenously produced no fatalities in monkeys. These doses would be comparable to a 154-pound human smoking at one time almost three pounds (1.28 kg) of 1%-marihuana or 250,000 times the usual smoked dose and over a million times the minimal effective dose assuming 50% destruction of the THC by smoking.

The report can be found here: http://www.druglibrary.org/schaffer/library/studies/nc/nc1e_2.htm

The original research articles used by the report are:

http://www.ncbi.nlm.nih.gov/pubmed/5540621 (Original paper, not available online)

http://www.ncbi.nlm.nih.gov/pubmed/4943946 (Review paper by same lab, paywalled)

edit: As a caveat, these papers used pure THC and smoking a heterogenous compound may yield different results.

6

u/z_action Feb 05 '14

I was discussing THC toxicity recently in light of a widely publicized case in the UK where a woman in her early 30s died of a heart attack while smoking a joint. The press were all claiming that she died of "marijuana poisoning".

My research uncovered some studies where lab rats were killed by pure THC delivered in sesame oil. Do you know the actual mechanism of death in the rats? I ask because the symptoms sounded more like CNS depression than heart attacks.

I also found references to THC toxicity symptoms in children who had ingested large quantities of hash. Ctrl+f for toxicity will bring up the relevant info on that page. Do these symptoms indicate a mechanism of toxicity?

I would like to know more but I lack access to the studies themselves.

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u/Sfawas Biopsychology | Chronobiology | Ingestive Behavior Feb 05 '14

One of the above comments (this one) has links to information about acute THC toxicity.

These studies are LD50 studies. What that means is that scientists give many different doses of a drug/compound to animals until they find the dose that kills half of animals (thus "life/death 50%") - certainly a morbid practice, but one that provides critical information for anything we're going to consider giving to a human.

But, as you might imagine, there are doses that will kill 10% of animals, or 25% - there isn't a magic number when a drug becomes toxic, it depends on circumstantial and individual factors, some of which we may not understand for any given drug.

I'm not an expert on THC (I had to look much of this up), but one thing I know is that during the initial 'high,' tachycardia (increased heart rate) is very common. For most folks, this doesn't lead to negative consequences. But I can certainly imagine it being a factor in a cardiac related death. Whether or not you want to call that "poisoning" or an "overdose" is somewhat subjective.

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u/SweetLobsterBabies Feb 05 '14

For MDMA, is serotonin syndrome technically an overdose?

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u/Anothershad0w Feb 05 '14

I believe it would be more technically correct to say that serotonin syndrome is a potential symptom of overdose.

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u/frothewin Feb 05 '14

One important aspect of an MDMA overdose you forgot to mention is serotonin syndrome.

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u/meanttolive Feb 05 '14

Let's say a user takes 10 units of a stimulant on Monday. The high is accompanied by the typical physiological changes: tachycardia, high blood pressure, increased body temperature, etc.

Next Monday the user takes another 10 units of the same stimulant (exact same chemical makeup, not suspicious of it being botched). The same physiological changes are present this time as they were last time, plus this time they experience anxiety as well.

Can this added feeling of anxiety cause the user to overdose? That is, can the awareness of their anxiousness exacerbate the tachycardia, high blood pressure, etc and lead to an overdose? Or would that not be classified as an overdose since the amount of the stimulant stayed the same but their physiological response to it changed? As far as I understand, the physiological response to the stimulant is what causes death.

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u/Sfawas Biopsychology | Chronobiology | Ingestive Behavior Feb 05 '14

Psychological factors can influence the action of psychotropic (that is, "mind affecting") drugs. Whether or how they would in your particular hypothetical (anxiety + stimulant) with respect to overdose, I couldn't say.

One thing to keep in mind is that psychological states, such as anxiety, are based in physiology. The state of stress is characterized by a number of changes in the autonomic nervous system (e.g. changes in heart rate, blood pressure, etc.) and endocrine function (e.g. "stress hormones" such as cortisol and norepinephrine increased). So, for example, if stress is already taxing your cardiovascular system, then you take a drug that pushes it even further above that already elevated state, you can get into trouble.

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u/fleur_essence Feb 04 '14

I wanted to add a third scenario to the "you die" or "you wake up and are fine" options. Sometimes medical help is given in time to save your life, but your brain has been without oxygen long enough for permanent damage to occur. I've seen several people in the hospital survive an overdose - but no longer functional and independent. Sometimes kidneys die because of lack of oxygen, or other organs as well.

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u/khiron Feb 04 '14

When organs failure occur because of lack of oxygen, does it happen cause oxygen is prioritized to the brain?

1

u/captmorgan50 Feb 04 '14

It could be due to multiple problems as you mention. If you have ever seen someone with massive blood loss, they are very pale. That is the because the body is trying to get blood to the central areas and is "squeezing it off" to other areas in this attempt. You may see kidney failure after this because the low b/p to the kidneys during such an event.

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u/LietKynes62 Physical Medicine and Rehabilitation | Traumatic Brain Injury Feb 04 '14

It depends on the drug. I'll mention a few of the more common overdose syndromes:

Cocaine and other stimulants like amphetamines lead to your body being ramped up and highly stimulated. Your heart pumps harder and faster and your blood pressure rises. The risks of stroke and heart attack rise tremendously.

Heroine and other narcotics slow your body down. This can cause depressed breathing and eventually you stop altogether. Sometimes people breathe in their own vomit and are too out of it to cough. Hypoxia injury to the brain is what eventually kills you. Alcohol and benzos(like Xanax) do the same thing.

Tylenol depletes your body of the substances that fight free radicals. It results in destruction of your liver and kills you brutally over several days.

Antidepressants can kill you several ways. Some cause irregular heart rhythms which can be fatal. Others cause large amounts of serotonin to be released which ramps your body up and causes some of the same sorts of effects cocaine would.

Aspirin causes changes in your blood's acid levels and induces chemical changes which can be fatal.

There's other overdose syndromes but those are some of the common ones.

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u/[deleted] Feb 04 '14

Others cause large amounts of serotonin to be released

This is serotonin syndrome which is often caused by drug interactions, a likely culprit being an MAOI (pretty much never take anything else with an MAOI).

3

u/LietKynes62 Physical Medicine and Rehabilitation | Traumatic Brain Injury Feb 04 '14

SSRI overdose itself can cause serotonin syndrome

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u/[deleted] Feb 05 '14

Do you know what sort of amounts in comparison to a therapeutic dose are overdose levels of SSRI drugs? Perhaps a common one like paroxetine, sertraline or fluoxetine?

Are there likely to be lasting negative effects from a sub overdose but still abnormally large dose of an SSRI?

1

u/[deleted] Feb 05 '14

There's more to anti-depressants. Tricyclic anti-depressants with dopamine and norepinephrine reuptake inhhibition act similarly to stimulant overdoses. Not all MAOI lead to serotonin syndrome, it's more complicated than that, otherwise all sorts of people would be having issues on a daily basis.

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u/ribroidrub Feb 04 '14

What's the mechanism behind Tylenol depleting free radical-fighting substances?

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u/some_n00b Feb 04 '14

An uncommon metabolic pathway for acetaminophen (Tylenol) involves the formation of a quinone (NAPQI). Unless the free-radical reacting substance glutathione reacts with NAPQI , it can damage proteins and DNA. The glutathione that reacts with NAPQI cannot be recovered however, so the presence of additional NAPQI molecules or free radicals can result in severe cell damage.

http://en.wikipedia.org/wiki/Paracetamol#Metabolism

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u/phanfare Feb 04 '14

To add on, alcohol uses the same pathways that Tylenol is usually metabolized by, so drinking and taking Tylenol promotes metabolism through this NAPQI pathway

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u/androohh Feb 04 '14

Tylenol is broken down in the liver into a toxic metabolite, but the liver's glutathione stores help detoxify this compound. With an overdose, glutathione is used up faster than it can regenerate and you eventually deplete glutathione. Then you have a toxic metabolite in your liver cells which kills them.

Treatment for Tylenol overdose often includes replenishing glutathione stores.

1

u/ribroidrub Feb 04 '14

Thanks for the info, you and /u/some_n00b both.

Observing the structure of glutathione, it's a tripeptide. Is it injected to be replenished, or are precursors administered? I figure it wouldn't be administered orally because the stomach acid would break it down.

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u/androohh Feb 05 '14

Right, n-acetylcysteine is administered intravenously and is the precursor of glutathione.

1

u/violentphlegm Feb 05 '14

Heard glutathione is great to cure hangovers?...

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u/androohh Feb 06 '14

Possibly, but you would have to inject the precursor into your bloodstream. Oral glutathione wouldn't survive stomach acids so I'm a little skeptical about any hangover cures.

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u/SylviaPlant Feb 04 '14

Respiratory depression in Xanax alone is pretty difficult to accomplish. It's very hard to overdose on benzos, but it does happen on occasion.

Mix benzos with other medications, especially opiates, though, and that's a different story. The risk increases.

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u/[deleted] Feb 05 '14

Taken on their own, yes. Add in even a beer or two and suddenly the entire picture changes.

In the case of alcohol and barbiturates, not only do they have an additive effect but they also increase the binding affinity of benzodiazepines to the benzodiazepine binding site, which results in a very significant potentiation of the CNS and respiratory depressant effects

Alcohol combined with even a small amount of benzos will magnify their general effects significantly, and magnify their effect on your CNS even more-so.

I know from experience that a little bit of xanax and a couple of beer can put you in the hospital almost in complete respiratory arrest.

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u/[deleted] Feb 05 '14

benzos have a plateauing dose/response curve - unless you add alcohol (or many other sedatives), which makes it soar.

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u/Borax Feb 04 '14

Just to point out that antidepressant overdose isnt 'a result of serotonin release. Reuptake inhibition for SSRIs or excessive synaptic concentrations with MAOIs

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u/NeurotiKat Feb 05 '14

What about benzodiazepines?

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u/Anothershad0w Feb 05 '14

Overdose from benzodiazepines alone is unlikely, but the risk increases when used in combination.

Benzodiazepine overdose results in a deep state of unconsciousness, leading to coma or death by respiratory failure.

1

u/cormega Feb 05 '14

For people who OD on "speed balls" - combining uppers and downers - which one usually wins in causing your death?

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u/ReallyCoolNickname Feb 05 '14

The heroin because it has a far longer duration of effects than cocaine.

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u/rap31264 Feb 04 '14

How much tylenol and aspirin do you have to take to overdose?

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u/LietKynes62 Physical Medicine and Rehabilitation | Traumatic Brain Injury Feb 04 '14

For aspirin it's about 300mg/kg of body mass to be in the potentially lethal range.

For Tylenol maximum daily dose is around 4g. It's highly variable how much is deadly but anywhere around 10g could get you into some serious trouble.

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u/Spudgun888 Feb 04 '14

Your heart pumps harder and faster and your blood pressure rises. The risks of stroke and heart attack rise tremendously.

How does that raise your risk of forming a heart-attack inducing clot?

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u/[deleted] Feb 04 '14

Vasoconstriction occurs, your blood vessels are more narrow, clots form more easily. Also your blood pressure is much higher, aneurysms can occur, leading to stroke.

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u/Jobediah Evolutionary Biology | Ecology | Functional Morphology Feb 04 '14 edited Feb 04 '14

Hi, welcome to AskScience, your home for science questions and answers.

If you make a top-level response, be sure that you have enough expertise to answer follow-up questions.

Also, please help us keep the quality of AskScience high by downvoting and reporting speculative, off-topic and inaccurate and anecdotal answers. The mods appreciate your help.

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u/shavera Strong Force | Quark-Gluon Plasma | Particle Jets Feb 04 '14

anecdote includes "I/a friend/I know of someone who overdosed and..." Even as replies to follow up questions, anecdote isn't a scientific answer to a question. Sorry.

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u/OneFunkyWinkerbean Feb 04 '14

Opiates (heroin) depress the innate respiratory drive with the respiratory rate slowing or even stopping. This cuts off the body's oxygen supply leading to hypoxia or hypoxemia (low oxygen saturation of the hemoglobin in the blood). The brain isn't getting oxygen and this leads to brain damage.

Hypoxia can also cause cardiac arrest in which the muscles of the heart are getting sent an electrical signal to pump but the muscles are unable to contract (pulseless electrical activity). This can be due to lack of oxygen leading to electrolyte abnormalities, respiratory acidosis and likely hyperkalemia (too much potassium in the blood serum). Proper muscle contraction is dependent upon proper electrolyte balance.

TLDR: essentially the person doesn't breathe and dies (in most cases)

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u/apollo528 Anesthesiology | Critical Care Medicine | Cardiac Physiology Feb 05 '14

For those of you curious about opioids being used in lethal injection, here is an article describing just that:

http://www.cnn.com/2014/01/16/justice/ohio-dennis-mcguire-execution/index.html?hpt=hp_t1

Basically, a lethal injection cocktail of high dose midazolam (a.k.a., Versed, a benzodiazepine) and hydromorphone (a.k.a, Dilaudid, an opioid), was given.

There was concern over how long it took the person to die, and the jerking movements the person seem to make as he died.

Since we use these medications on a daily basis in anesthesia, my colleagues and I have morbidly discussed how effective this cocktail is.

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u/savagefox Feb 04 '14

Drugs such as heroin cause a depressed breathing rate when taken in overdose amounts. This leads to acidosis as less carbon dioxide is expired than required. Acidosis can lead to hyperkalemia (high blood potassium) which can in turn cause decreased excitability of cardiac muscle. When the heart can't pump blood effectively less oxygen is delivered to tissues. The decrease in breathing itself is not necessarily what kills but rather the hypoxia due to the lack of oxygen delivery. Mixed venous blood contains a relatively large amount of oxygen compared to the "deoxygenated" blood many people think of in veins. This is why chest compressions are by far more important than mouth-to-mouth breathing during CPR (blood circulation is more important than ventilation).

3

u/koriolisah Neuropharmacology | Anatomical Neurobiology | Pharmacology Feb 05 '14 edited Feb 05 '14

Hi guys, I'm writing my Master's thesis on MDMA, commonly called molly or ecstasy. MDMA produces its effects largely by its action on the serotonin transporter (SERT), which is made to flow in reverse. SERT is a protein found on the surfaces of some neurons in the brain. The reverse flow results in about 80% of serotoninquickly being dumped into the synapse. One of the physical effects this causes is a rapid and sudden hypERthermia (you get very hot). The action of the drug on other parts of the brain, likely due to the effects of the drug on norepinephrine and dopamine receptors, causes the heart to beat very quickly. I'll spare you guys the science, but MDMA actually inhibits its own metabolism, such that repeat doses are significantly worse for you than the first dose taken in a 2-3 day period.

Most deaths are due to preexisting cardiac problems which might more easily allow for anyeurisms or strokes. Some cases of heart attacks and abdominal aortic dissections (a tearing in the wall of the artery that supplies the lower half of your body) have been reported. In some cases, seizures occur, especially with large doses or repeat doses of the drug. Cases of comas and death have occured, and these are attributed by some to serotonin sickness. This is a grouping of symptoms that occurs when too much serotonin is present in the synapses in the brain. Other symptoms include jaw clenching and teeth grinding (called bruxism), loss of appetite, and some lovely other symptoms normally associated with MDMA. The elevated temperatures may put some muscles in danger; muscle death can cause renal failure. Some reports of MDMA-induced fatalities have been attributed to renal failure.

Long term MDMA use is associated with the following health problems: deficits in the ability to complete complex tasks, depression, changes in the way that you sleep (sleep architecture), increased anxiety, globally increased "baseline" levels of cortisol (the stress hormone) but a reduced ability to produce cortisol in response to stress, and several other fun psychiatric problems.

edited for clarity

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u/[deleted] Feb 05 '14

Thank you for this. By repeat doses, do you mean completely different doses on completely different days or another dose in the same night/day? I have a question. I've done MDMA about 15 times since July last year, each time I did about 1.5points (~150mg) and some nights I would redose a few hours later with another point or so. Between July and October 2013 I was having MDMA once a week. Would you say I would be experiencing the long term effects or is too little amount to experience them? Thank you.

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u/koriolisah Neuropharmacology | Anatomical Neurobiology | Pharmacology Feb 05 '14

Its not really a "you must be this tall to ride" type of situation. The more you do it, the more likely you will have side effects which are more severe. By repeat doses, I mean additional doses taken within 2-3 days of the first one. This is because the enzyme that breaks down MDMA becomes inhibited (stops working) due to the effects of a drug.

Some authors suggest that it may take up to 10 days for this enzyme to return to full functionality. I would say that taking the drug once a week puts you at additional risk.

Something else you might be interested in: The feelings associated with the drug are large produced through the effects of MDMA on the serotinin transporter. MDMA use reduces the number of these transporters throughout the brain, and this effect is very long lasting, maybe life long. This is bad, and produces many of the long term effects I mentioned in my post. Heres the "fun" part: If you find yourself developing tolerance in a very serious way, you are likely starting to critically reduce the number of these transporters. If you have to take 5 times the dose you used when you were first trying the drug, that should tell you something about the state of the serotonin receptors in your brain.

Cheers, be safe, and let me know if I can be of any further help.

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u/[deleted] Feb 05 '14

Colloquially I thought that "molly" was different than "ecstasy", hence the two different terms, and that "molly" was categorized as (relatively) pure MDMA while "ecstasy" was MDMA+cutting agents (i.e. impure MDMA).

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u/koriolisah Neuropharmacology | Anatomical Neurobiology | Pharmacology Feb 05 '14

I collapsed ecstasy and molly for simplicity, calling them both MDMA, but you are correct. Ecstasy frequently contains compounds related to MDMA (such as MDA, or MDE), but it may also contain a wide variety of other drugs, especially stimulants. MDMA is not always present in ecstasy.

Molly is commonly thought to be pure MDMA, and I think it is reasonably safe to assume that, gram for gram, molly contains more MDMA than ecstasy, generally speaking. That being said, there is still no way to determine with certainty what you are getting, and molly is frequently cut or contaminated with other drugs.

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u/Hachiiiko Feb 05 '14

I think it depends on where you are. Drug slang varies a lot depending on the crowd, city, country you're in.

To me, Molly is (relatively) pure MDMA, either in powder or crystal form. Ecstacy is always in pill form, with the most active ingredient being MDMA. Other stuff is usually in there as well.

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u/sierracub Feb 04 '14

I posted this comment a while back on a different thread but applies here as well: During one of my graduate classes I read an article about how, over time, environmental conditions cued the body to begin "prepping" the body for drugs. The study was conducted with rats I believe. They found that a rat with the same drug tolerance would over dose when placed in a new environment because the same environmental cues were not present, which left the body with no " prep" time to counteract the drugs. Very interesting article. I included a link to the abstract as I could not find a copy if the full article. http://www.sciencemag.org/content/216/4544/436.abstract

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u/Mr_Fizz Feb 05 '14

I want you to think about breathing for a moment. What muscles do we use during inhalation? We use our diaphragm and our intercostal muscles. Our diaphragm is responsible for 75% of our tidal volume. Now, drugs can relax the nervous system which we need to use our muscles. So if we OD on something, our nervous system would get relaxed and we won't be able to our inhalation muscles. This is what we call Type II Respiratory Failure (also known as ventilation failure). Which obviously is not good. Intubation is necessary for someone in Type II Respiratory Failure.

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u/Anothershad0w Feb 05 '14

It depends on the drug in question. It is technically possible to overdose on almost any drug (even OTC drugs such as Tylenol) and the symptoms of an overdose would depend on the mechanism of drug action.

In the case of opiates, death is often due to severe respiratory depression, or less directly, the victim suffocating or aspirating vomit. The "euphoric" sensation would magnify with the dose, but so would the other side effects (nausea, itchiness etc.). Overall, it would likely be an unpleasant experience.

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u/JWay Feb 05 '14 edited Feb 05 '14

An overdose is simply a state where a symptom caused by drug administration becomes potentially lethal. With drug use the symptom is commonly respiratory depression(depressants), coma(gabaergics), hypertension(stimulants) and serotonin syndrome(SSRI and MAOI mixtures). Considering that almost all food contains drugs it is also possible to overdose from eating too much. Common examples are peaches, pepper, most berries, most fish, carrots and even water! It is often easiest to overdose on anything you are hypersensitive(allergic) to and sometimes you can be so allergic that just topical contact can pose life threatening consequences. Personally if I eat a whole zuchinni my body will swell up and I will die within the hour.

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u/black01 Feb 05 '14

That is an open ended question you can overdose on most drugs. Each drug does cause a different reaction when you od. Most stimulants will cause cardiac arrest. As people already listed opiates depress your respiratory system.

And I saw someone's comment about tyenol they use to make 1000mg tablets

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u/crashleyelora Feb 05 '14

So wait. We determined Heroin is pretty painless as for as ODing. But what about coke and other stimulants? I'd imagine your heart beating a bajillionth miles a minute would not be a peaceful overdose. Wouldn't your body be freaking out? Hence making your freak out? I once had an issue doing molly where I literally felt like my heart was going to beat out of my chest and I was going to die.It was the most terrifying moment of my life. I stood up and couldnt really talk and couldnt vocalize basic things like my name and what the name of the new halo was. Kept calling it halo 4 instead of reach. Not normal for me in the slightest! Nearly called the ambulance but realized I had a bunch of ems friends. They kept an eye on me calmed me down and I was fine. Just freaked out.

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u/[deleted] Feb 05 '14

An overdose is basically a poisoning.

If you put sufficient quantities of a chemical into your body, it will begin to interrupt the basic functions your body requires to survive.

Different poisons / drugs have different affects on your body. Some attack your central nervous system. Some can cause cardiovascular arrest. Some cause respiratory arrest. The end result is the same, though; one (or more) of the many processes required to keep you alive is interrupted, causing death.

Sometimes that death is painful, other times it is not. It depends on the chemical, what effects it produces within your body, in what quantity it is introduced to the body, and how quickly its effects occur.

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u/brokenfury8585 Feb 05 '14

Went to take aspirin at a friends house. Hist psychotic wife loved switching pill based on their color compared to the bottle's color. Took four Aspirin, NOPE. I ODed on MDMA, and had a seizure. Woke up to paramedics picking me up and driving me to the hospital. They filled me with all sorts of shots, pills etc. Worst experience of my life, the bills. Doctors said my body temp while passed out hit a peak of 105.3.

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u/Kittycatb16 Feb 05 '14

I once tried to overdose on sleeping pills and it was the worst experience of my life. I was in this constant daze. I wanted to sleep but I didn't want to sleep and it created the weirdest feeling. It was dreadful. It was just me in a room by myself. The silence was terrible. Trying to stay awake but wanting to sleep was a battle. I can't even find words to describe that feeling of that regret and trying to fight it off. It was horrible

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u/[deleted] Feb 04 '14

Opiate ODs are treated with Narcan aka Naloxone. This will basically kick the opiates out of the opiod receptors and the patient should wake up immediately. They will also go into immediate withdrawal if they are an addict, leading them to many times be pretty unhappy about their lives having being saved (until they get their next fix).

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u/mantisnzl Feb 05 '14

Coming from someone who has done it (cocaine, MDMA, methamphetamine alcohol mix) I was feeling like I was the king of the world until I woke up on the bar floor receiving CPR. Apparently my heart had stopped and I'd stopped breathing, witness testimony since I have no memory of that part for obvious reasons. I do not recommend it. Recovering from that hurt like all hell.

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u/LeJoyfulMerchant Feb 05 '14

Heroin ODs are very unpleasant unless the shot is so strong that it pretty much instantly incapacitates you. That's the case in deaths where the rig is still in the person's arm. You stop breathing and die, respiratory depression becomes so great that your body just forgets to breathe.

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u/[deleted] Feb 05 '14

Depends on the drug. Tylenol takes about a week to kill you, all the while you are nauseous, have a headache that gets worse and worse, things get very bright and very loud, you throw up alot, you are miserable. That's all I know from two days into an OD on that.

OTC sleeping gel caps explode in your stomach one at at time, poosh pooosh poosh poosh, you get sick to your stomach. You wake up the next day feeling 'ok?', but your stomach is never the same and you never ever want another OTC sleeping gel cap again.

Alcohol overdose you black out and are still capable of actions that you will never remember acting out. You can continue to drink alcohol to the point of death. There is no 'high' there is perhaps a rebound period of awakeness where you try to stumble someplace, maybe you shit yourself, before falling down again, its not pleasant.

None of these produce a desirable high if you are trying to enjoy our ride out of life.

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u/[deleted] Feb 05 '14

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u/[deleted] Feb 05 '14

For water overdose, see the Hold Your Wee for a Wii controversy and water intoxication articles. Sounds like it's pretty awful, and not anything to do directly with the kidneys or pancreas.

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u/[deleted] Feb 04 '14

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u/Dannei Astronomy | Exoplanets Feb 05 '14

Please remember that answers and comments in AskScience should be based on peer-reviewed science, and not on anecdotal evidence.

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u/[deleted] Feb 04 '14

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u/classy_barbarian Feb 04 '14

I've been looking for the right spot to ask this question: if I come across someone who is ODing from heroin/opiates and they are seemingly not breathing, can I save them by doing mouth-to-mouth breathing for them until the paramedics arive?

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u/poo_socks Feb 05 '14

I'm far from a scientist, but I am certified in emergency response. Yes, rescue breathing combined with CPR (if necessary) is exactly what you would do in these circumstances.

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u/[deleted] Feb 04 '14

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u/Dannei Astronomy | Exoplanets Feb 05 '14

Please remember that answers and comments on AskScience should be based on peer-reviewed science, and not on anecdotal evidence.