Effects of Hallucinogens and Other Drugs on Mood and Performance

"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~Each volunteer will receive a hallucinogen on at least one of five sessions. More drugs are listed than will be administered to increase the degree to which volunteers are blind to the drugs being studied. It is important that the volunteer and research staff be blinded to specific drug conditions to minimize confounding the results with expectations about the nature of drug effects."