St. John'S Wort + Levonorgestrel And Ethinyl Estradiol And Ferrous Fumarate Interaction
Moderateinteraction on record
Description
St. John's wort induces CYP3A4 enzymes, potentially decreasing contraceptive effectiveness and increasing breakthrough bleeding.
Mechanism
CYP3A4 enzyme induction
Source: NLP:norethindrone and ethinyl estradiol and ferrous fumarate