A patient of glaucoma with bronchial asthma presents to the emergency with status asthmaticus, causative agent might have been –
Pilocarpine eye drop
Timolol eye drop
Betaxolol eye drop
Levobunolol eye drop
Pilocarpine and timolol (β - blockers) can cause bronchospasm. However, β-blockers are the most commonly used drugs for POAG and pilocarpine is used very rarely these days. So, best answer here is timolol.