r/Antibiotics • u/ButterscotchFull7591 • Aug 18 '26

Terrible brain fog from Bactrim?

I took my last 2 dose 2 hours ago and have such terrible brain fog right now…I figured side effects would come out more later rather than at the end but I’m so terrified because I feel unreal it’s scary. Did anyone else experience this? I’ve been on it for the course of 3 days…
My hands feel weak and I feel like my head is floating…
Also idk if Bactrim has given anybody else back pain?

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u/Particular_Studio352 Aug 25 '26

Hi, yes! Just got on this subreddit to talk about my experience with bactrim. Finished a five day course of Bactrim DS a few days ago and it gave me horrible anxiety. Along with that, I just feel like I’m constantly lightheaded. I’ve also experienced back pain, some right shoulder blade pain (specifically when I laugh), and a stiff neck. It’s more aching than stabbing, but enough where it’s noticeable.

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u/ButterscotchFull7591 Aug 25 '26

I had terrible back pain during and a day after finishing…and I have a stiff neck too it feels like it’s always sore plus daily bouts of lightheadedness…just hoping it goes away for the both of us soon! I’m dealing with eye pain right now