Tranquilizers and analgesics are neurologically active drugs. These affect the message transfer mechanism from the nerve to the receptor.
Tranquilizers are a class of chemical compounds used for the treatment of stress and mild or even severe mental diseases. These relieve anxiety, stress, irritability, or excitement by inducing a sense of well-being. They form an essential component of sleeping pills.
Some tranquilizers namely, chlordiazepoxide and meprobamate, are relatively mild tranquilizers suitable for relieving tension.
Equanil is used in controlling depression and hypertension.
Derivatives of barbituric acid viz., veronal, amytal, nembutal, luminal and seconal constitute an important class of tranquilizers. These derivatives are called barbiturates.
Barbiturates are hypnotic, i.e., sleep-producing agents. Some other substances used as tranquilizers are valium and serotonin.