nitrite ester alkyl nitrite http://homosaurus.org/v2/poppers http://purl.bioontology.org/ontology/MESH/C000708864 https://en.wikipedia.org/wiki/Alkyl_nitrites https://en.wikipedia.org/wiki/Category:Alkyl_nitrites https://en.wikipedia.org/wiki/Poppers https://www.wikidata.org/wiki/Q3124118 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, initially within the gay community. a group of chemical compounds based upon the molecular structure R-ONO. Formally they are alkyl esters of nitrous acid. They are distinct from nitro compounds.. Alkyl nitrites were initially, and largely still are used as medications and chemical reagents, a practice which began in the late 19th century. In their use as medicine, are often inhaled for relief of angina and other heart-related symptoms of disease. However, when referred to as "poppers", alkyl nitrites represent recreational drugs. alkyl nitrites poppers synthetic aphrodisiac