depressant


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Related to depressant: Anti depressant

depressant,

any one of various substances that diminish functional activity, usually by depressing the 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.
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. 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.
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, sedativessedative,
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.
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, alcohol, and 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
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 are all depressants. Depressants have various modes of action and effects. Some are primarily used medically to relieve emotion stress, anxiety, and tension; others induce sleep, and still others are used to relieve pain. Depressants also reduce the rate and force of contraction of the heart and are used in the treatment of some forms of heart diseaseheart disease,
any of several abnormalities of the heart and its function in maintaining blood circulation. Heart disease is the cause of approximately half the deaths in the United States each year.
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. Many depressants can induce psychological dependence and addiction (see drug addiction and drug abusedrug addiction and drug abuse,
chronic or habitual use of any chemical substance to alter states of body or mind for other than medically warranted purposes. Traditional definitions of addiction, with their criteria of physical dependence and withdrawal (and often an underlying
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). Typically, overdosage results in confusion, coma, and convulsions. In many cases, the effects of one depressant are intensified if another depressant is taken at the same time, e.g., if barbiturates are taken with alcohol. Because of their potential for abuse, there are now strict regulations regarding the dispensing of many depressant drugs.

depressant

1. Med able to diminish or reduce nervous or functional activity
2. a depressant drug
References in periodicals archive ?
Psychotoxic conditions are also established from excessive or continued use of many of the depressants. This may result in behavioral disorders, especially when the more potent of the barbiturates (the most widely abused depressants) are used.
Depressants. CNS depressants (sedatives, tranquilizers) are given to severely stressed, anxious, or erratically sleeping patients.
The report includes estimates for the market size of pour point depressants for 2015 and projected demand of the same by 2020.
He said: "I find it staggering that people can buy anti- depressants over the internet ( it is very worrying.
At the end of 2003 more than 50,000 children were being given the medication, with more than 170,000 prescriptions for anti- depressants issued to under-18s in the UK.
The anti depressants should be thought of as giving you some breathing space to try to find out the underlying causes.
A new report reveals a 116 per cent rise in five years in the use of anti- depressants such as Prozac.