In a randomized double‑blind placebo‑controlled crossover study in 16 healthy volunteers, oral mescaline (100–800 mg) produced dose‑dependent subjective and autonomic effects with dose‑proportional pharmacokinetics (Tmax ≈2 h, t1/2 ≈3.5 h) and increasing duration (6.4–14 h), with reduced tolerability and frequent nausea/emesis at 800 mg. Co‑administration of the 5‑HT2A antagonist ketanserin markedly attenuated and shortened the effects of 800 mg mescaline, indicating that its acute effects are primarily mediated by 5‑HT2A receptors.
- Published
- Journal
- Translational Psychiatry
- Authors
- Klaiber, A., Schmid, Y., Becker, A. M., Straumann, I., Erne, L., Jelusic, A., Thomann, J., Luethi, D., Liechti, M. E.