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tranquilizer,drug whose action calms the central nervous systemnervous system,
network of specialized tissue that controls actions and reactions of the body and its adjustment to the environment. Virtually all members of the animal kingdom have at least a rudimentary nervous system.
..... Click the link for more information. , decreasing emotional agitation without impairing alertness. Tranquilizing drugs differ from hypnotic drugs such as barbituratesbarbiturate
, any one of a group of drugs that act as depressants on the central nervous system. High doses depress both nerve and muscle activity and inhibit oxygen consumption in the tissues. In low doses barbiturates act as sedatives, i.e.
..... Click the link for more information. in that they do not act on the brain's cortical areas but rather on its lower portions, e.g., the hypothalamushypothalamus
, an important supervisory center in the brain, rich in ganglia, nerve fibers, and synaptic connections. It is composed of several sections called nuclei, each of which controls a specific function.
..... Click the link for more information. . They have been found helpful in the treatment of tension and mental illness. Reserpinereserpine
, alkaloid isolated from the root of the snakeroot plant (Rauwolfia serpentina), a small evergreen climbing shrub of the dogbane family native to the Indian subcontinent.
..... Click the link for more information. , which appeared on the market in 1952, was the first tranquilizer to be used in modern Western medicine. Other drugs used as tranquilizers include the phenothiazinesphenothiazine
, any one of a class of drugs used to control mental disorders. Phenothiazines, along with other antipsychotic, or neuroleptic, drugs are used for such disorders as schizophrenia, paranoia, mania, psychosis resulting from mental deficiency, some forms of senility,
..... Click the link for more information. , meprobamatemeprobamate
, tranquilizing drug that acts as a depressant of the central nervous system and is commonly used in the treatment of anxiety and sometimes schizophrenia. Although meprobamate is chemically unlike barbiturates and has lower toxicity, it has similar pharmacological
..... Click the link for more information. , certain muscle relaxants and anticonvulsants, and lithium carbonate. See also psychopharmacologypsychopharmacology
, in its broadest sense, the study of all pharmacological agents that affect mental and emotional functions. The term is usually applied more specifically to the study and synthesis of drugs used in the control of psychiatric illnesses, namely the
..... Click the link for more information. .
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Any agent that brings about a state of relief from anxiety, or peace of mind.
Any agent that produces a calming or sedative effect without inducing sleep.
Any drug, such as chlorpromazine, used primarily for its calming and antipsychotic effects, or such as meprobamate, used for symptomatic treatment of common psychoneuroses and as an adjunct in somatic disorders complicated by anxiety and tension.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
tranquillizer, tranquilliser (US), tranquilizer
a drug that calms a person without affecting clarity of consciousness
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005