Levonorgestrel And Ethinyl Estradiol And Ferrous Fumarate + St Johns Wort 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