Is it possible to have a placebo group when doing a study on psilocybin? Would participants in the placebo not notice the lack of psychedelic effects?
EDIT: In the original link it says the placebo group received a much lower dose, so that seems to be one way of doing it.
I suppose different trials do it in various ways, for hers there was a placebo group that was given a strong antihistamine. Participants in the trial were allowed to opt in for the real dosing day once the trial concluded. I suppose this was to entice people to join, as otherwise it was basically 50/50 if you would get the trial treatment you were looking for. Post trial dosing was obviously omitted from the results.
Then again what if showing some funky hallucinogenic images/movies would have the same effect on some people? We surely know that people can go crazy (so have psychological effects) in cults and similar settings. What if intense visual/sonic/etc stimulation, visual distortions etc. together with messaging like "it will change your life and cure your anxieties" is the key in this therapy?
sounds like in that case you’re not testing the efficacy of high versus sober, you’re testing heroic dosing versus micro dosing.
One way is using niacin in high doses, also known as vitamin B3, as an active placebo to induce a sensation of heat and cause the skin to flush red, which is a typical reaction to tryptamines.
The rest is a regular placebo. It can be a really strong thing when you are feeling hot.