التداخل بين فلوكونازول ونوريثيستيرون وإيثينيل إستراديول

CYP3A4 inhibitors such as itraconazole or ketoconazole may increase plasma hormone levels.

There were no relevant effects on hormone level in the 50 mg fluconazole study, while at 200 mg daily, the AUCs of ethinyl estradiol and levonorgestrel were increased 40% and 24%, respectively.

Effective contraceptive measures should be considered in women of child-bearing potential who are being treated with fluconazole 400 to 800 mg/day and should continue throughout the treatment period and for approximately 1 week (5 to 6 half-lives) after the final dose.

Oral contraceptives Two pharmacokinetic studies with a combined oral contraceptive have been performed using multiple doses of fluconazole.

Thus, multiple-dose use of fluconazole at these doses is unlikely to have an effect on the efficacy of the combined oral contraceptive.