<prompt> Which one of the following is an oculotoxic drug?IsoniazidEthambutolStreptomycinRifampin  <response>: Ans. b EthambutolRef: Parsons 22e, p. 244, 366; Kanski 7e, p. 868Visual symptoms or toxic optic neuropathy occurs more commonly if dose exceeds 25 mgkgday. Patient experiences red-green colour blindness and blurring 