delphic analysis regarding 20 popular recreational drugs.<unk>  was ranked 14th in dependence, 15th in physical harm, and 13th in social harm. Out of the 20 drugs ranked in order of individual and societal harm by David Nutt,<unk>  was third to last, or approximately 1/10th as harmful as alcohol. The most significant adverse effect of<unk>  was impairment of mental functioning while intoxicated. Mental disorders<unk>  may trigger panic attacks or feelings of extreme anxiety, known colloquially as a "bad trip".<unk>  is capable of exacerbating mental illnesses and precipitating the early onset of schizophrenia in vulnerable individuals. Although population studies have not found an increase incidence of mental illness in psychedelic drug users overall, with psychedelic users actually having lower rates of depression and substance abuse than the control group, there is evidence that people with severe mental illnesses like schizophrenia have a higher likelihood of experiencing adverse effects from taking<unk> . Suggestibility While publicly available documents indicate that the CIA and Department of Defense have discontinued research into the use of<unk>  as a means of mind control, research from the 1960s suggests that both mentally ill and healthy people are more suggestible while under its influence. Flashbacks "Flashbacks" are a reported psychological phenomenon in which an individual experiences an episode of some of<unk> 's subjective effects after the drug has worn off, persisting for days or months after hallucinogen use. Individuals with hallucinogen persisting perception disorder experience intermittent or chronic flashbacks that cause distress or impairment in life and work. Cancer and pregnancy The mutagenic potential of<unk>  is unclear. Overall, the evidence seems to point to limited or no effect at commonly used doses. Studies showed no evidence of teratogenic or mutagenic effects. Addiction and tolerance Tolerance to<unk>  builds up with consistent use and cross-tolerance has been demonstrated between<unk> , mescaline, and psilocybin. Researchers believe that tolerance returns to baseline after two weeks of not using psychedelics. The NIH states that<unk>  is addictive, while most other sources state it is not. A 2009 textbook states that it "rarely produces compulsive use." A 2006 review states it is readily abused, but does not result in addiction. There are no recorded successful attempts to train animals to self-administer<unk>  in laboratory settings.
Lysergic acid diethylamide
Brevetoxin
Anatoxin-a
Bungarotoxin
Botulinum toxin
Charybdotoxin
Muscimol
N1-Methyl-lysergic acid diethylamide