i did 400 mg of diphenhydramine twice in two months and all that happened was i heard shit and i fell asleep and woke up numerous times to take a piss. but when i got out of bed, i was all heavy and shit and i felt like i was being pushed down. the next day after both times, i felt insane and i kept feeling like the pink floyd lyric "there is someone in my head, but its not me." you may remember that in my sig, and thats because of the way i felt. also the best cure to this empty confusion and semi depression is a blunt of some chronic. got me right back on top of my life. overall, a good trip when you are bored and have no other drugs, i mean no other drugs.