Antibiotics may lessen the effectiveness of hormonal contraception

Unintended pregnancies seem more common among women who took a course of antibiotics while also being on hormonal contraception. — Filepic

Antibiotics may lessen the effectiveness of hormonal contraceptives, finds an analysis of unwanted side effects associated with the combined use of these drugs, published in the journal BMJ Evidence Based Medicine.

Women on the Pill should be advised to take extra precautions to avoid unintended pregnancy, when prescribed antibiotics, advise the researchers.