Which of the following are physiological antagonists: (A) Adrenaline and Isoprenaline, (B) glucagon and insulin, (C) Isoprenaline and Propranolol, (D) All of the above
Answer is B. Adrenalin and histamine and glucagon, insulin are physiological antagonists Physiological antagonism - opp effect on the same physiological system by two drugs glucagon increases blood glucose, insulin decreases- blood glucose adrenaline- bronchodilatation histamine- broncho constriction Ref KD Tripathi 8th ed.