All of the following can cause Optic Neuritis,except -: (A) Rifampicin, (B) Digoxin, (C) Chloroquine, (D) Ethambutol
Answer is A. Important drugs causing optic neuritis are quinine, chloroquine, ethambutal, isoniazid(INH), Streptomycin, Digoxin, Amiodarone, NSAIDs (aspirin, indomethacin, phenylbutazone, ibuprofen), vigabatrine, disulfiram.