Interação entre Efavirenz e Estradiol + dienogeste
Efavirenz e Estradiol + dienogeste: ambas as bulas profissionais descrevem uma interação que geralmente exige monitoramento, alteração da dose ou espaçamento entre as doses.
Geralmente controlável com monitoramento ou alteração da dose. Informe ao seu farmacêutico que você toma os dois.
O que dizem as bulas da FDA
Da bula de Estradiol + dienogeste (Natazia) · em vigor desde 2024-06-26
Women who take medications that are strong CYP3A4 inducers should not choose Natazia as their oral contraceptive while using these inducers and for at least 28 days after discontinuation of these inducers due to the possibility of increased breakthrough bleeding and/or decreased contraceptive efficacy.
…exposure at steady state. [See Clinical Pharmacology (12.3).] Substances Increasing the Systemic Exposure of COCs (enzyme inhibitors): Concomitant administration of moderate or strong CYP3A4 inhibitors like azole antifungals (for example, ketoconazole, itraconazole, voriconazole, fluconazole), verapamil, macrolides (for example, clarithromycin, erythromycin), diltiazem,…
In a multiple dose study investigating the effect of CYP3A4 inhibitors (ketoconazole and erythromycin) on Natazia, steady state estradiol and dienogest exposures were increased when co-administered with ketoconazole or erythromycin [see Clinical Pharmacology ( 12.3 )] .
• CYP3A4 induction : Women taking strong CYP3A4 inducers (for example, carbamazepine, phenytoin, rifampicin, and St.
Drug Interactions Women who take medications that are strong cytochrome P450 3A4 (CYP3A4) inducers (for example, carbamazepine, phenytoin, rifampicin, and St.
Da bula de Efavirenz · em vigor desde 2024-03-31
Hormonal contraceptives: Oral Ethinyl estradiol/ Norgsetimate Implant Etonogestrel ↑ active metabolites of norgestimate * ↓ etonogestrel A reliable method of barrier contraception should be used in addition to hormonal contraceptives.
A reliable method of barrier contraception should be used in addition to hormonal contraceptives.
There have been postmarketing reports of contraceptive failure with etonogestrel in efavirenz-exposed patients.
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