Obstetrics and Gynaecologycommon
A 34-year-old woman wants reliable contraception while receiving rifampicin for pulmonary tuberculosis. She has previously used a combined oral contraceptive pill but now has frequent heavy periods and wishes to reduce them; she has no pelvic infection or uterine abnormality. Her clinician explains that rifampicin may reduce the effectiveness of several systemic hormonal methods. Which one of the following is the most appropriate option?