https://www.clinicaltrials.gov/show/NCT02033707
One of the following or placebo will be given:
Hallucinogens: DMT, 4-phosphoryloloxy-N-diethyltryptamine, dipropyltryptamine (DPT), ketamine, dextromethorphan, mescaline, PCP, psilocybin, salvinorin-A, LSD, d-lysergic acid amide (LSA), MDMA, cannabis
Sedatives/anxiolytics: alprazolam, diazepam, lorazepam, secobarbital, temazepam, triazolam, zolpidem
Antihistamines: diphenhydramine, chlorpheniramine
Stimulants: d-amphetamine, caffeine, ephedrine, methylphenidate, diethylproprion
Opioids: heroin, morphine, oxycodone, hydrocodone, methadone, codeine
Other: alcohol, scopolamine, nicotine