<unk>  also known as marijuana among other names, is a psychoactive drug from the<unk> plant. Native to Central and South Asia, the<unk> plant has been used as a drug for both recreational and entheogenic purposes and in various traditional medicines for centuries. Tetrahydrocannabinol (THC) is the main psychoactive component of<unk>  which is one of the 483 known compounds in the plant, including at least 65 other<unk> oids, including<unk> iol (CBD).<unk> can be used by smoking, vaporizing, within food, or as an extract.<unk> has various mental and physical effects, which include euphoria, altered states of mind and sense of time, difficulty concentrating, impaired short-term memory, impaired body movement (balance and fine psychomotor control), relaxation, and an increase in appetite. Onset of effects is felt within minutes when smoked, but may take up to 90 minutes when eaten. The effects last for two to six hours, depending on the amount used. At high doses, mental effects can include anxiety, delusions (including ideas of reference), hallucinations, panic, paranoia, and psychosis. There is a strong relation between<unk> use and the risk of psychosis, though the direction of causality is debated. Physical effects include increased heart rate, difficulty breathing, nausea, and behavioral problems in children whose mothers used<unk> during pregnancy; short-term side effects may also include dry mouth and red eyes. Long-term adverse effects may include addiction, decreased mental ability in those who started regular use as adolescents, chronic coughing, susceptibility to respiratory infections, and<unk> oid hyperemesis syndrome.<unk> is mostly used recreationally or as a medicinal drug, although it may also be used for spiritual purposes. In 2013, between 128 and 232 million people used<unk> (2.7% to 4.9% of the global population between the ages of 15 and 65). It is the most commonly used illegal drug in the world, though it is legal in some jurisdictions, with the highest use among adults () in Zambia, the United States, Canada, and Nigeria. While<unk> plants have been grown since at least the 3rd millennium BCE, evidence suggests that it was being smoked for psychoactive effects at least 2,500 years ago in the Pamir Mountains. Since the early 20th century,<unk> has been subject to legal restrictions. The possession, use, and cultivation of<unk> is illegal in most countries. In 2013, Uruguay became the first country to legalize recreational use of<unk>  Other countries to do so are Canada, Georgia, Malta, Mexico, and South Africa, plus 18 states, two territories, and the District of Columbia in the United States (though the drug remains federally illegal).
Cannabis 
Heroin
Cocaine
Cocaine 
Benzyl alcohol
Phencyclidine
Methamphetamine
Nicotine