<prompt> When one drug decreases or inhibits the action of other it is called?AntagonismAgonismInverse agonismSynergism  <response>: Ans. is a i.e., Antagonism When one drug decreases or inhibits the action of other. Effect of drugs A B effect of drug A effect of drug B. Antagonism may be : a Physical Based on physical propey b Chemical The two drugs react chemically and form an inactive product. c Physiologicalfunctional The two drugs act on different receptors or by different mechanisms, but have opposite ove effects on the same physiological function ie have pharmacological effect in opposite direction. E Receptor The antagonist interferes with binding of the agonist with its receptor or inhibits the generation of response consequent to such binding. 