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Ethinyl estradiol: Ethinyl estradiol is subject to a significant degree of presystemic conjugation (phase II metabolism). Ethinyl estradiol escaping gut wall conjugation undergoes phase I metabolism and hepatic conjugation (phase II metabolism). Major phase I metabolites are 2-OH-ethinyl estradiol and 2-methoxy-ethinyl estradiol. Sulfate and glu-curonide conjugates of both ethinyl estradiol and phase I metabolites, which are excreted in bile, can undergo enterohepatic circulation. Excretion Text Continues Below

Etonogestrel and ethinyl estradiol are excreted in urine, bile, and feces. At steady state, on Day 21, the elimination half-life of etonogestrel is 27.8± 7.2 hours and the elimination half-life of ethinyl estradiol for the combination tablet is 23.9± 25.5 hours. For the 0.01 mg ethinyl estradiol tablet [yellow], the elimination half-life at steady state, Day 28, is 18. 9± 8.3 hours. Special Populations Race There is no information to determine the effect of race on the pharmacokinetics of Mircette ® (desogestrel/ ethinyl estradiol and ethinyl estradiol) Tablets. Hepatic Insufficiency No formal studies were conducted to evaluate the effect of hepatic disease on the disposi-tion of Mircette ® . Renal Insufficiency No formal studies were conducted to evaluate the effect of renal disease on the disposition of Mircette ® . Drug-Drug Interactions Interactions between desogestrel/ ethinyl estradiol and other drugs have been reported in the literature. No formal drug-drug interaction studies were conducted (see PRECAUTIONS section).
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