Comparative Pharmacology
Head-to-head clinical analysis: CYCLAFEM 7 7 7 versus MIRCETTE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: CYCLAFEM 7 7 7 versus MIRCETTE.
CYCLAFEM 7/7/7 vs MIRCETTE
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Combination estrogen-progestin contraceptive. Ethinyl estradiol suppresses gonadotropin release (FSH, LH) via negative feedback on hypothalamic-pituitary axis; norethindrone induces endometrial changes that inhibit implantation and thickens cervical mucus.
Combination of ethinyl estradiol and desogestrel; estrogen and progestin inhibit gonadotropin release, suppressing ovulation and altering cervical mucus and endometrial receptivity.
One tablet (norethindrone 0.5 mg/ethinyl estradiol 35 mcg) orally once daily for 7 days, then one tablet (norethindrone 0.75 mg/ethinyl estradiol 35 mcg) orally once daily for 7 days, then one tablet (norethindrone 1 mg/ethinyl estradiol 35 mcg) orally once daily for 7 days. Dispensed in a 21-tablet pack with 7 placebo tablets. For contraception, take one tablet daily at same time each day for 28 days; begin next pack after 28-day cycle.
One tablet daily for 21 days, followed by 7 placebo tablets. Each active tablet contains 0.015 mg ethinyl estradiol and 2 mg chlormadinone acetate. Route: oral.
None Documented
None Documented
Terminal half-life: 5-13 hours (mean 8 hrs); clinical context: supports every-28-day dosing interval for intramuscular depot.
Desogestrel active metabolite etonogestrel: 21-24 hours; ethinyl estradiol: 12-14 hours
Renal: ~50-60% as conjugated metabolites; Fecal: ~30-40% via bile; <1% unchanged.
Urine (50-60% as metabolites, <10% unchanged), feces (30-40% as metabolites)
Category C
Category C
Oral Contraceptive
Oral Contraceptive