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Popper is a slang term given broadly to drugs of the chemical class called alkyl nitrites that are inhaled. They act on the body as vasodilaters. Most widely sold products include the original isoamyl nitrite or isopentyl nitrite, and  isopropyl nitrite. Isobutyl nitrite is also widely used but is banned in the European Union. In some countries, poppers are labeled or packaged as room deodorizers, leather polish, nail polish remover, or videotape head cleaner to evade anti-drug laws.
Popper use has a relaxation effect on involuntary smooth muscles, such as those in the throat and anus. It is used for practical purposes to facilitate anal sex by increasing blood flow and relaxing sphincter muscles. The drug is also used for recreational drug purposes, typically for the "high" or "rush" that the drug can create, and to enhance sexual pleasure in general.
Poppers were part of club culture from the mid-1970s disco scene and returned to popularity in the 1980s and 1990s rave scene.20th-century use
Although amyl nitrite is known for its practical therapeutic applications, the first documented case of recreational use was in 1964. The poppers "craze" began in the early 1970s in the gay male community in bars, discothèques and bathhouses. It was packaged and sold pharmaceutically in fragile glass ampoules wrapped in cloth sleeves which, when crushed or "popped" in the fingers, released the amyl nitrite for inhalation, hence the colloquialism poppers. The term extended to the drug in any form as well as to other drugs with similar effects, e.g. butyl nitrite which is packaged under a variety of trade names in small bottles.In the late 1970s Time magazine and The Wall Street Journal reported that popper use among gay men began as a way to enhance sexual pleasure, but "quickly spread to avant-garde heterosexuals". A series of interviews conducted in the late 1970s revealed a wide spectrum of users.
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