Avifanz Efavirenz Dienogest + Estradiol Valerate
ModerateEfavirenz is on the list of medicines that can interfere with Dienogest and Estradiol Valerate. The leaflet text gives no detail beyond naming it, so the exact effect of taking the two together isn't stated here.
These medicines are often taken together with some care. Your doctor may change a dose, space them apart or check on you more often. Make sure your doctor and pharmacist know you take both.