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sedative

sedative any of a variety of drugs that relieve anxiety. Most sedatives act as mild depressants 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 ), i.e., they induce sleep, and as anesthetics. Many sedatives, including barbiturates , meprobamate (Miltown), and benzodiazepines (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 are compounds that calm without excessively reducing mental alertness.

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sedative

World Encyclopedia | 2005 | Â© World Encyclopedia 2005, originally published by Oxford University Press 2005. (Hide copyright information) Copyright

sedative Drug used for its calming effect, to reduce anxiety and tension; at high doses it induces sleep. Sedative drugs include narcotics, barbiturates, and benzodiazepines.

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sedative

A Dictionary of Nursing | 2008 | Â© A Dictionary of Nursing 2008, originally published by Oxford University Press 2008. (Hide copyright information) Copyright

sedative (sed-ă-tiv) n. a drug that has a calming effect, relieving anxiety and tension. See also anxiolytic.

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