What is H1 antagonist has all the functins except ? and explain in detail?
Ans. is 'c' i.e., Decrease gastric acid secretion o Gastric acid secretion is H2 receptors, thus H2-antagonists (not H1 antagonists) decrease gastric acid secretion. o H1- antihistaminics are used in idiopathic pruritis (as antipruritic) and veigo (cinnarizine). o H1-antihistaminics cause sedation.