T Nation

Do Antihistamines Affect Progress?

I’m taking promethazine right now for my sleep, and it’s really helping because I used to wake up multiple times at night but now even if I do wake up I can roll over and get back to sleep easily.

I was wondering if it could be affecting my efforts in the gym though, does it have any effect on these things?

My guess is that if you were waking up multiple times and now you can get a good nights sleep, that is more beneficial to you than any theoretical harm the drug itself could be doing in terms of muscle gain.