a) Tranquilizers are a class of chemical compounds used for the treatment of stress, and mild orever 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.
e.g. Chlordiazepoxide, Meprobamate
b) Analgesics are drugs used to reduce or abolish pain without causing impairment of consciousness, mental confusion, incoordination or paralysis or some other disturbances of nervous system.
They are of two types:
Non-narcotic analgesics
e.g. Aspirin and
Narcotic analgesics
e.g.Morphin.