title: Possible interactions of antihistamines and antibiotics with oral contraceptive effectiveness.
mesh_terms: D000900:Anti-Bacterial Agents / Q000009:adverse effects*; D003276:Contraceptives, Oral; D004347:Drug Interactions; D005260:Female; D006634:Histamine H1 Antagonists / Q000009:adverse effects*; D006801:Humans; D011247:Pregnancy; D012189:Retrospective Studies
chemical_list: D000900:Anti-Bacterial Agents; D003276:Contraceptives, Oral; D006634:Histamine H1 Antagonists