Explain the following terms with an example for each : (3 marks)
(i) Antibiotics (ii) Antiseptics (iii) Analgesics
(i) Antibiotics : Those chemical substances which are produced completely or partially by
chemical synthesis in low concentration and either kill or inhibit the growth of microorganisms
by intervening in their metabolic processes, are known as antibiotics.
Tetracycline Bacteriostatic antibiotics,
Penicillin Bactericidal antibiotics
(ii) Antiseptics : These are chemical substances which prevent the growth of micro-organisms
and may even kill them and safe to be applied on living tissues.
Example : Furacin, soframycin etc.
(iii) Analgesics : These drugs are the chemical substances which are given to relieve body
pains. These act on the central nervous system.
These are classified as Narcotics i.e. habit forming and non-narcotics i.e. not habit forming.
Examples of Narcotics : Opium which contains alkaloids such as Codeine and Morphine.
Examples of Non-Narcotics : Aspirin and Ibuprofen.