Hey corpus I believe the active is "dimenhydrinate", but they are extremely similar substances so the same warnings apply
not to be nit picky or anything!
OP: here is my recommendation to you: instead of using a synthetic anticholinergic that has very little interaction information with caapi alkaloids, why not use a natural one with a long history of human use and has been succesfully mixed with ayahuasca for thousands of years probably?
I'm speaking of course of the tropane-bearing solanacae! Get a hold of some datura strommonium seeds (or other datura spp. But strammonium supposedly has the most consistent alkaloid levels. I usually use D. Wrightii -sacred datura - because I usually only collect the seeds in California and that's what I find). Brugmansia is used traditionally with caapi but I have never used it, so I can't give any advice. With datura, 1-5 seeds is enough for a strong antiemesis - scopolamine is probably a much more effective antiemetic- however 3 and up will change the nature of the trip (not in a bad way, it actually tends to make the visions clearer but with another influence present in the content).
I think you can get datura seeds online but I never have. It's a really common plant in the USA, as brugmanisa is in south America. I usually leave an offering of tobacco whenever I collect thorn-apples, I wouldn't want to incur the wrath of THIS seductress!
بسم الله الرحمن الرحيم
Fairly responsible Kratom user.
"whenever he drank ayahuasca, he had such beautiful visions that he used to put his hands over his eyes for fear somebody might steal them."
in between the grinding-brakes of a train crash while aluminum-foil robots make obnoxious sex noises on a static-filled walkie-talkie radio.