Atazanavir ve Norgestrel ve etinilestradiol etkileşimi

Concomitant administration of CYP3A4 inhibitors such as itraconazole, fluconazole, grapefruit juice or ketoconazole may increase plasma hormone concentrations.

…transcriptase inhibitors Significant changes (increase or decrease) in the plasma concentrations of the estrogen and/or progestin have been noted when COCs are co-administered with some HIV protease inhibitors (decrease [e.g., nelfinavir, ritonavir, darunavir/ritonavir, (fos) amprenavir/ritonavir, lopinavir/ritonavir, and tipranavir/ritonavir], or increase [e.g., indinavir…

Hormonal contraceptives: ethinyl estradiol and norgestimate or norethindrone ↓ ethinyl estradiol ↑ norgestimate c ↑ ethinyl estradiol ↑ norethindrone d Use caution if considering coadministration of oral contraceptives with REYATAZ or REYATAZ with ritonavir.

If REYATAZ with ritonavir is coadministered with an oral contraceptive, it is recommended that the oral contraceptive contain at least 35 mcg of ethinyl estradiol.

If REYATAZ is administered without ritonavir, the oral contraceptive should contain no more than 30 mcg of ethinyl estradiol.

Coadministration of REYATAZ or REYATAZ with ritonavir and other hormonal contraceptives (eg, contraceptive patch, contraceptive vaginal ring, or injectable contraceptives) or oral contraceptives containing progestogens other than norethindrone or norgestimate, or less than 25 mcg of ethinyl estradiol, has not been studied; therefore, alternative methods of contraception…