Hydroxyzine
Off topic
I recently got a butt load of the stuff and it is definitely better with poppies than diphenhydramine. Slightly euphoric on its own too, as I take potentiators 45-60min before poppies and the euphoria starts before the poppies are used. When methocarbamol and methyltrexate are added, it is more pronounced and the full regime of potentiators would be satisfying without the opiates. I sometimes add primidone when I don't have any driving to do.
Hydroxyzine is definitely better than any of the antihistimines I know of that are sold in USA. I really want to try orphenadrine. Sounds like it is even better.
Too bad neither of those are OTC in the USA. Nor are methocarbamol, methyltrexate, or primidone(which converts to phenobarbitol and could be used by itself.
50-100 mg seroquel also improves the hiigh and so does .15mg clonidine.But this is about antihistimines, and hyroxyzine is the best either to potentiate opiates or alone/in cocktail of weak drugs.
I hope to get orphenadrine sometime.
I thought I'd mention that selegeline(not an antihistimine) converts to both amphetamine and methamphetamine and I am going to buy at least 1,000 pills soon since it is so cheap. I was unaware when I first took it and was surprised by what something considered a nootropic did.
Sorry for the off topic info, it just doesn't seem well known and I thought some readers might like it.
I was pleasantly surprised by hydroxyzine, expecting to get somethine near a clone of diphenhydramine, which works to potentiate but provides no euphoria and is probably less useful as potentiator than hydroxyzine(It's hard to tell if the better effects are due solely to added euphoria or partially to better potentiation. What matters is that it feels better.
I think orphenadrine or it + hydroxyzine might be a good deal better. Wish I wasn't broke.
Loratadine and some other non drowsy AH was definitely less effective.
Little difference in pleasure with diphenhydramine or dimenhydrinate, but the latter seems less sedating.
Promethazine may be better than diph or possibly hydroxyzine, or it could be that I took it at higher dose in cough syrup. Never tried it any other way. This chem is also a weak antipsychotic. I know seroquel adds nicely with poppies. Same may be true of low-mod doses of other antipsychotics, though seroquel is the only one that I get pleasure from on its own.I think the antihistimines and antipsychotics share certain effects so perhaps they would potentiate poppies similarly to antihistamines. Some drugs are classified as both.