A psychoactive substance is defined as a chemical substance, other than a nutrient or essential dietary ingredient, that affects brain function to produce alterations in sensation, perception, mood, consciousness, cognition, and behaviour.
Exposure to a psychoactive substance can cause changes in the structure and functioning of neurons.
Depressants: they slow down the central nervous system; for example: tranquillisers, alcohol, heroin and other opiates, cannabis.
Stimulants: they excite the nervous system; for example: nicotine, amphetamines, cocaine, caffeine.
Hallucinogens: they distort how things are perceived; for example: LSD, mescaline, 'magic mushrooms', cannabis.
Hallucinogens: (Mushrooms, LSD, LSA, AL-LAD, DMT, 5-MeO-DMT, Harmine, Ibogaine, Mescaline, Salvia, Muscimol, 2C-X series, DOx series, NBOMe series).
Depressants: (Cannabis, Alcohol, GHB, Benzodiazepines, Opioids [ Heroin, Codeine, Tramadol, Morphine, Opium, Hydrocodone, Hydromorphone, Oxycodone, Oxymorphone, Poppy extracts, Fentanyl ]).
Stimulants: (Adderall, MDMA, Cocaine, Methamphetamine, Street amphetamine, Ephedrine, 5-APB, Nicotine, Caffeine).
Dissociatives: (DXM, Ketamine, MXE, Nitrous, PCP).
Deliriants: (Diphenhydramine, Scopolamine)
Alcoholic beverages: (contain psychoactive ethyl alcohol, are produced legally throughout the world. Their production supports a commercial alcohol industry. Consumption of alcohol is subject to regulation in most countries, namely by means of age restrictions.
Tobacco: a recreational drug containing nicotine, is produced legally in countries such as Cuba, China, and the United States. This also supports a tobacco industry and the production of a variety of tobacco products, which, like alcoholic beverages, are subject to age restrictions in most countries.
Caffeine: a stimulant drug, is extracted from plants including the coffee plant and the tea bush. It is the most widely consumed psychoactive substance in the world, remaining unregulated and generally recognized as safe by the U.S. Food and Drug Administration.