(a) Antiseptics are applied to the living tissues such as wounds, cuts, ulcers and diseased skin surfaces. Examples are furacine, soframicine, etc.
Disinfectants are applied to inanimate objects such as floors, drainage system, instruments, etc. Example one percent solution of phenol is disinfectant.
(b) We require artificial sweetening agents because it is excreted from the body in urine unchanged. It appears to be entirely inert and harmless when taken. Its use is of great value to diabetic persons and people who need to control intake of calories.
(a) Tranquilizers are neurologically active drugs. These affect the message transfer mechanism from nerve to 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. Examples are chlordiazepoxide and meprobamate.
(b) Ant-acids are used for treatment of acidity, such as sodium hydrogencarbonate or a mixture of aluminium and magnesium hydroxide.
(c) Analgesics are neurologically active drugs. They reduce or abolish pain without causing impairment of consciousness, mental confusion, incoordination or paralysis or some other disturbances of nervous system.
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