This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
[{'content': 'The most commonly used drug in open angle glaucoma is- \nSelect and explain. \nA. Pilocarpine, B. Physostigmine, C. Epinephrine, D. None', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'None' Approach to treatment of open angle glaucoma o Sta monotherapy with topical b-blocker or latanoprost. If target i.o.t. is not attained either change over to the alternative drug or use both the above concurrently. o Brimonidine/dorazolamide/dipivefrine are used only when there are contraindications to PG analogues or b-blockers. o Topical miotics and oral acetazolamide are added only as the last reso. The most commonly used drugs for open angle glaucoma are b-blockers. Because of several drawbacks miotics (pilocarpine) are now used only as the last option.", 'role': 'assistant'}]