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: Ophthalmology
[{'content': 'Drug contraindicated in dendritic keratitis is: March 2012 \nSelect and explain. \nA. 5% idoxuridine, B. Cycloplegics, C. Topical antibiotics, D. Dexamethasone', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans: D i.e. Dexamethasone The corneal involvement in herpes simplex virus infection can be epithelial (dendritic/ geographic keratitis), stromal (necrotizing & non-necrotizing stromal keratitis) & endothelial Drugs & epithelial keratitis Epithelial keratitis responds well to topical antivirals (5% IDU/ idoxuridine drops) which are prescribed along with topical antibiotics to prevent secondary bacterial infection, lubricants to relieve discomfo & cycloplegics It is uniformly accepted that topical steroids are contraindicated in the presence of active viral replication as occurs in herpes simplex epithelial keratitis', 'role': 'assistant'}]