title: Interaction between antibiotic therapy and contraceptive medication.
abstract: An interaction between a low-dose oral contraceptive and a long-acting, narrow-spectrum penicillin preparation is reported, and a mechanism for the interaction is proposed. Various drugs that can affect the efficacy of the contraceptive pill and their modes of interaction are listed.
authors.forename: R
authors.initials: R
authors.lastname: Bainton
mesh_terms: D000328:Adult; D003278:Contraceptives, Oral, Hormonal / Q000378:metabolism / Q000494:pharmacology*; D003692:Delayed-Action Preparations; D004347:Drug Interactions; D004997:Ethinyl Estradiol / Q000378:metabolism / Q000494:pharmacology*; D019304:Ethinyl Estradiol-Norgestrel Combination; D005260:Female; D006801:Humans; D008964:Molar, Third / Q000601:surgery; D009644:Norgestrel / Q000378:metabolism / Q000494:pharmacology*; D010400:Penicillin G / Q000378:metabolism / Q000494:pharmacology* / Q000627:therapeutic use; D011247:Pregnancy; D011292:Premedication; D011485:Protein Binding; D014095:Tooth, Impacted / Q000601:surgery
chemical_list: D003278:Contraceptives, Oral, Hormonal; D003692:Delayed-Action Preparations; D009644:Norgestrel; D004997:Ethinyl Estradiol; D019304:Ethinyl Estradiol-Norgestrel Combination; D010400:Penicillin G