Unknown All of the statement about H1 anti histaminics are true except – A Tolerance may develop to some of its side effects B local application can be used for contact dermatitis C combination with an H,1 antagonist may control some cases of chronic urticaria D Many of them exhibit cholinergic effect 💡 Explanation All of the statement about H1 anti histaminics are true except - ✓ Correct Answer: D. Many of them exhibit cholinergic effect