Check the ingredients, if it's diphenhydramine, I wouldn't recommend it. If it's just a regular, non-drowsy allergy pill without diphenhydramine than it's probably okay (but Im not totally sure so don't take my word for it). I'm not sure if M and diphenhydramine is a dangerous combo or not, I've never thought about it before, but I can say from experience that diphenhydramine on its own will make you feel sooooo tired and wonky. I use it to sleep sometimes. I've used it before to help fall asleep after doing drugs and it usually makes me feel really, really wonky and uncomfortable when mixed with drugs. I've never taken it while being on Mdma so maybe the MDMA would overpower the effects of the benadryl, but I dunno... I personally wouldn't risk it. Just wait til tomorrow or the next day...
