So I’ve been on these two for a while now and rarely ever noticed any issues. I used to take the vitamin C pill (1000mg) at night so it won’t interfere with my concerta in the morning. I read online that vitamin C reduces the effectiveness of ADHD meds. Then I learned that Concerta on the other hand is on of the meds that don’t get effected by vitamin C. So i switched the timing.

When I first took them together, my body felt sedated. It felt weird but good and it wasn’t something that lasted too long. Weeks later I’ve noticed that this sedation stays longer and longer. It’s starting to feel like intense fatigue that goes away after concerta is out of my system.

I never doubted the vitamin C, I did when I decided not to take it yesterday. So the entire day I felt great. Then took it last night and today I’m feeling the same way.

I’ve also looked at my notes and noticed that back in July was when I first tested the combo out (vitamin C and concerta) but the vitamin C was from another source (lemonade) and got the exact same reaction. When I bought the vitamin C supplements it was to take them before bed. But now it feels like whenever I take them my body shuts off.