i) Antipyretic – Drug used to reduce fever.
ii) Antiseptic – Drug which either kill or prevent the growth of microorganisms. It is applied to living tissues such as wounds, cut, ulcers and diseased skin surfaces.
iii) Antibiotic – Drug used to treat infections because oftheir low toxicity for humans and animals. It is a substance produced wholly or partly by chemical synthesis, which in low concentrations inhibits the growth or destroys microorganisms by intervening in their metabolic processes.