Dažnai neteisingai bandoma THC ar kitų kanabinoidų poveikį priskirti [[haliucinogenai|haliucinogenams]]. Su tuo griežtai nesutinka psichiatrai: THC nesukelia [[haliucinacija|haliucinacijų]], kokias gali sukelti [[LSD]], [[psilobicinas]], [[meskalinas]] ar kiti haliucinogenai.
Teoriškai [[mirtis|mirtina]] dozė yra 40000400000000000000000 kartų didesnė už psichoaktyvią.<ref name="Marihuana reconsidered">{{cite book|title=Marihuana reconsidered|author=Lester Grinspoon|url=http://books.google.com/books?id=C-0oW-uYRrMC|pages=227|quote=Firstly, it is important to realize that marijuana is a substance which can objectively be considered harmless. According to Lester Greenspoon, M.D., former associate professor of psychiatry at the Harvard Medical School, the hypothetical lethal dose of marijuana is 40,000 times the psychoactive dose. The lethal dose of alcohol, a legal drug, is 4 to 10 times the psychoactive dose. The figure for marijuana is hypothetical in that is has only been shown to be true in rats; there are no records of lethal marijuana overdose in humans anywhere.|isbn=887303148X|year=1996|publisher=Apogeo Editore}}</ref><ref name="From Chocolate to Morphine">{{cite book|title=From Chocolate to Morphine|author=Andrew Weil, Winifred Rosen|url=http://books.google.com/books?id=p6zyPxi4PYoC|pages=118|quote=Aside from being non-toxic, marijuana is essentially harmless. There is no scientific evidence for any lasting physiological or psychological detriment resulting from even the heaviest marijuana use. As Andrew Weil, M.D., and Winifred Rosen state, marijuana's "medical safety … is great. Aside from respiratory irritation, heavy marijuana use does not seem to cause… medical problems."|isbn=0618483799|year=2004|publisher=Mariner Books}}</ref> Pagal tikslius medicininius duomenis marihuana yra žymiai saugesnė negu dauguma įprastinių mūsų valgių{{faktas}}. Pavyzdžiui, suvalgius dešimt žalių [[bulvė|bulvių]] gali ištikti toksinis priepuolis. Palyginimui, fiziškai neįmanoma suvalgyti tiek marihuanos, kad tai sukeltų mirtį. Dar neužfiksuota nei viena mirtis dėl marihuanos perdozavimo išskyrus alerginius atvejus{{faktas}}.
