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An anaphrodisiac (also antaphrodisiac or antiaphrodisiac) is something that quells or blunts the libido. It is the opposite of an aphrodisiac, something that enhances sexual appetite. The word ''anaphrodisiac'' comes from the Greek privative prefix ἀν-, denoting negation, and ''aphrodisiac'', from the Greek goddess of love, Aphrodite. ==Available anaphrodisiacs classes of substances== Some common anaphrodisiacs are ethanol (alcohol) and tobacco, but this is typically an unintended consequence and not often the main reason for use. While alcohol is used socially because it initially reduces mental inhibitions, studies have shown that over time alcohol physically decreases arousal and makes achieving climax more difficult. For this reason alcohol is considered an anaphrodisiac. Opioids, the class of pain-reducing substances which include morphine, heroin, and hydrocodone, are anaphrodisiacs. Other options are prescription synthetic compounds such as estrogens and anti-androgen drugs. Side effects of certain antidepressant medications may be anaphroditic in nature (e.g. SSRIs and certain antipsychotics), however, there are no prescription psychotropic drugs that have reliable anaphroditic effects. . Antiandrogens such as cyproterone acetate and medroxyprogesterone acetate are sometimes prescribed to convicted sex offenders who are released on parole in an effort to stop them reoffending, however the high doses required often cause a range of side effects which may limit compliance. Other antiandrogens such as spironolactone and finasteride may also lower sex drive. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Anaphrodisiac」の詳細全文を読む スポンサード リンク
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