A patient came to the casualty with acute bronchial asthma after treatment of glaucoma. The probable drug may be
Timolol is a non selective β blocker (act on β1& β2 ). β2 blocking effect of Timolol cause blockage of dilator β2 receptor so it can precipitate asthma. Whereas Betaxolol is cardioselective beta blocker that acts only on β2  receptor.
Timolol
Betaxolol
Latanoprost
Anticholinesterase