Hallucinogens are a diverse group of drugs that alter perception (awareness of surrounding objects and conditions), thoughts, and feelings. They cause hallucinations, or sensations and images that seem real though they are not. Hallucinogens can be found in some plants and mushrooms (or their extracts) or can be human-made. People have used hallucinogens for centuries, mostly for religious rituals. Common hallucinogens include the following: ayahuasca, DMT, D-lysergic acid diethylamide (LSD) , peyote (mescaline), and 4-phosphoryloxy-N,N-dimethyltryptamine (psilocybin) . Read the DrugFacts
Since the start of the AIDS epidemic, PCP has been closely associated with AIDS. Because it only occurs in an immunocompromised host, it may be the first clue to a new AIDS diagnosis if the patient has no other reason to be immunocompromised (. taking immunosuppressive drugs for organ transplant ). An unusual rise in the number of PCP cases in North America, noticed when physicians began requesting large quantities of the rarely used antibiotic pentamidine , was the first clue to the existence of AIDS in the early 1980s.