التداخل بين أمبيسيلين وإيثينوديول ثنائي الأسيتات وإيثينيل إستراديول

Oral Contraceptives : May be less effective and increased breakthrough bleeding may occur.

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