Oral contraceptive formulations drug interactions

List of drug interactions
Contraceptive Steroids P450 Enzymes in Human Liver

Contraceptive Steroids
Interactions between contraceptive steroids and other drugs have been reported in the literature. Return to top

P450 Enzymes in Human Liver
Although norelgestromin and its metabolites inhibit a variety of P450 enzymes in human liver microsomes, under the recommended dosing regimen, the in vivo concentrations of norelgestromin and its metabolites, even at the peak serum levels, are relatively low compared to the inhibitory constant (Ki). Return to top