Letter: Rifampicin and the pill.
D003276:Contraceptives, Oral / Q000037:antagonists & inhibitors*; D005260:Female; D006801:Humans; D012293:Rifampin / Q000494:pharmacology* / Q000627:therapeutic use; D014376:Tuberculosis / Q000188:drug therapy
D003276:Contraceptives, Oral; D012293:Rifampin