What are the following substances ? Give one example of each. (3 marks)
(i) Analgesics (ii) Antibiotics (iii) Tranquilizers
(i) Analgesics : Analgesics reduce or abolish pain without causing impairment of consciousness,
mental confusion, incoordination or paralysis or some other disturbances of nervous system.
Example : Aspirin.
(ii) Antibiotics : Antibiotics refers to a substance produced wholly or partly by chemical synthesis
which in low concentration inhibits the growth or destroys microorganisms by intervening in
their metabolic processes.
Example : Penicillin.
(iii) Tranquilizers : Tranquilizers are a class of chemical compounds used for the treatment of
stress, and mild or even severe mental disease.
Example : Equanil.