depressant


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Related to depressant: Anti depressant

depressant

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. 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 disease. Many depressants can induce psychological dependence and addiction (see drug addiction and drug abuse). 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.
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depressant

1. Med able to diminish or reduce nervous or functional activity
2. a depressant drug
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
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.