title: Apparent oral contraceptive failure associated with antibiotic administration.
abstract: The concomitant use of antibiotics and oral contraceptives should be included in the assessment of contraceptive failure. A case of unwanted adolescent pregnancy during the use of a semisynthetic penicillin and an oral contraceptive is presented and discussed. Advising a different contraceptive method or an additional contraceptive modality may be indicated in adolescents taking long-term antibiotic medication.
mesh_terms: D000293:Adolescent; D004338:Drug Combinations; D004347:Drug Interactions; D004965:Estrogen Antagonists / Q000008:administration & dosage*; D005260:Female; D006801:Humans; D009640:Norethindrone / Q000008:administration & dosage / Q000037:antagonists & inhibitors*; D010068:Oxacillin / Q000008:administration & dosage*; D011247:Pregnancy; D011253:Pregnancy in Adolescence
chemical_list: D004338:Drug Combinations; D004965:Estrogen Antagonists; D009640:Norethindrone; D010068:Oxacillin