Well in case anybody else is interested in using these things as a dream aid instead of a full-on trip, I have decided that in accordance with the dosage thing:

Oral Diphenhydramine Dosages
(Recreational)
Threshold -- 10mg
Light -- 25-150 mg
Common -- 150-300 mg
Strong -- 250-500 mg
Heavy -- 400-700
LD50 (Lethal Dose*) -- 500 mg/kg in rats

...and based on this experience report, I'm gonna take eight pills. I'm gonna be in my room and I'm gonna stay up for two hours after I take them, but when I start to feel the trippy effects I'm gonna let myself doze off and hope they translate into dreamspace.

Erowid ho!
Dick Justice Reviewed by Dick Justice on . Benadryl doses? I know you can hook down lots of diphenhydramine in order to get a Datura-style hallucination experience, but that's not what I'm looking for. I wanna know how many I should take just to get "heavier" than usual, without really tripping. I'm not looking for a buzz, I've just been working on lucid dreaming and a little astral projection stuff (since I accidentally did it to myself fairly recently and got so agitated about it that I did some research). So yeah, I have a bunch of pills with Rating: 5