A patient of glaucoma with bronchial asthma presents to the emergency with status asthamaticus, causative agent might have. been
B i.e. Timolol eye drop B2 receptors are responsible for bronchodialation, therefore blocking B2 would aggravate asthma and Timolol is nonselective beta blocker (i.e. blocks B1 & B2 both) Topical nonselective 0 blockers (e.g. timolol) are contraindicated in asthma Q, COPD, CHF, sinus bradycardia & AV blocks where as selective pi blockers (e.g. betaxolol) are C/I in sinus bradycardia & atrioventricular blocks only.
Pilocarpine eye drop
Timolol eye drop
Betaxolol eye drop
Levobunolol eye drop