This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autonomic nervous system, Subject name: Pharmacology
[{'content': 'Lid retraction is a side effect of wof anti- glaucoma drug \nSelect and explain. \nA. Latanoprost, B. Brimonidine, C. Brinzolamide, D. Pilocarpine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Brimonidine:- This clonidine congener is more a2 selective and more lipophilic than apraclonidine. mech of action:- It lowers i.o.t. by 20-27% by reducing aqueous production and by increasing uveoscleral flow. Peak effect on i.o.t. occurs after 2 hours. Side effects:- Allergic conjunctivitis, mydriasis, eyelid retraction, conjunctival blanching followed by hyperemia, dry mouth, sedation and a small fall in BP have been noted. Ref:- kd tripathi; pg num:-154', 'role': 'assistant'}]