التداخل بين تحت سترات البزموت وميترونيدازول وتتراسيكلين وإيثينوديول ثنائي الأسيتات وإيثينيل إستراديول

Oral Contraceptives: Decreased efficacy possibly resulting in pregnancy; use a different or additional form of contraception.

Drug Interactions Oral Contraceptives Concurrent use of bismuth subcitrate potassium, metronidazole and tetracycline hydrochloride with oral contraceptive may make oral contraceptives less effective due to an interaction with the tetracycline component of bismuth subcitrate potassium, metronidazole and tetracycline hydrochloride.

Oral Contraceptives Concurrent use of bismuth subcitrate potassium, metronidazole and tetracycline hydrochloride with oral contraceptive may make oral contraceptives less effective due to an interaction with the tetracycline component of bismuth subcitrate potassium, metronidazole and tetracycline hydrochloride.

A similar association, though less marked, has been suggested for barbiturates, phenylbutazone, phenytoin sodium, and possibly with griseofulvin, ampicillin, and tetracyclines.