<prompt> All of the following can precipitate porphyria except ?SteroidsGriesiofulvinPenicillinEstrogen  <response>: Ans. is c i.e., Penicillin Penicillin is a safe drug in acute intermittent porphyria Drugs precipitating acute intermittent porphyria Barbiturates Griseofulvin Chlorpropramide Rifampicin Oral contraceptives Estrogen Phenytoin Sulfonamides 