<prompt> All of the following can cause Optic Neuritis, except-RifampicinDigoxinChloroquineEthambutol  <response>: Ans. a RifampicinRef Kanski 5e, p. 601, 603Important drugs causing optic neuritis are quinine, chloroquine, ethambutol, isoniazid INH, Streptomycin, Digoxin, Amoidarone, NSAIDs aspirin, indomethacin, phenylbutazone, ibuprofen, vigabatrine, disulfiram. 