This study evaluated the effect of the herbal remedy St. John's Wort on oral contraceptive (OC) therapy with respect to the pharmacokinetics of norethindrone and ethinyl estradiol, ovarian activity and breakthrough bleeding.
Interaction of St. John's Wort with oral contraceptives: effects on the pharmacokinetics of norethindrone and ethinyl estradiol, ovarian activity and breakthrough bleeding.
Journal Article,
Clinical Trial,
Research Support, U.S. Gov't, P.H.S.,
Controlled Clinical Trial,
Research Support, Non-U.S. Gov't,
Research Support, N.I.H., Extramural
