A patient came to the casualty with acute bronchial asthma after treatment for glaucoma. The probable drug may be:: (A) Timolol, (B) Betaxolol, (C) Latanoprost, (D) Anticholinesterase
Answer is A. Ans. (A) Timolol(Ref KDT 8th/e p167)Timolol is a non-selective beta blocker and can precipitate acute attacks of asthma in a susceptible individual via blockade of b2 receptors. Betaxolol is a cardioselective beta blocker and is less likely to cause this adverse effect.