Which of the following antiglaucoma drugs can cause heterochromia iridis: (A) Timolol, (B) Lantanoprost, (C) Apraclonidine, (D) Acetazolamide
Answer is B. Refer katzung 12e p 328 PGF2 alpha agonists like lantanoprost can cause iris pigmentation (heterochromia iridis) and growth of eye lashes(hyperichosis) as adverse effect