Tranquilizing drug definition of Tranquilizing drug in the Free Online Encyclopedia.

sedative, any of a variety of drugs that relieve anxiety. Most sedatives act as mild depressants depressant, any one of various substances that diminish functional activity, usually by depressing the nervous system . Barbiturates , sedatives , alcohol, and meprobamate are all depressants. Depressants have various modes of action and effects.
..... Click the link for more information. of the nervous system, lessening general nervous activity or reducing the irritability or activity of a specific organ. Sedatives taken in small quantities are useful in relieving coughing, nausea, or convulsions and in lessening anxiety. In increasing doses sedatives act as hypnotics (see hypnotic drugs hypnotic drugs, drugs that induce sleep, sometimes called soporifics. In general, hypnotics are central nervous system depressants . Alcohol, laudanum (see opium ), bromide salts, and herbs such as valerian have been used as hypnotics.
..... Click the link for more information. ), i.e., they induce sleep, and as anesthetics. Many sedatives, including barbiturates barbiturate (bärbĭch`ərāt'), any one of a group of drugs that act as depressants on the central nervous system .
..... Click the link for more information. , meprobamate meprobamate (məprō`bəmāt')
..... Click the link for more information. (Miltown), and benzodiazepines benzodiazepine (bĕn'zōdīăz`əpēn')
..... Click the link for more information. (Librium and Valium), are habit-forming and should be taken only under medical direction. Chloral hydrate, ethyl alcohol, bromide salts, and antihistamines can all be used as sedatives. Tranquilizers tranquilizer, drug whose action calms the central nervous system , decreasing emotional agitation without impairing alertness. Tranquilizing drugs differ from hypnotic drugs such as barbiturates in that they do not act on the brain's cortical areas but rather on its
..... Click the link for more information. are compounds that calm without excessively reducing mental alertness.

sedative

1. of or relating to sedation

2. Med a sedative drug or agent

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sedative
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