Comparative Pharmacology
Head-to-head clinical analysis: DEMULEN 1 50 28 versus SOJOURN.
Peer-Reviewed Evidence
Head-to-head clinical analysis: DEMULEN 1 50 28 versus SOJOURN.
DEMULEN 1/50-28 vs SOJOURN
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Combination oral contraceptive: Ethinyl estradiol and ethynodiol diacetate suppress gonadotropin secretion (LH, FSH) via negative feedback, inhibiting ovulation. Ethynodiol diacetate also increases cervical mucus viscosity and induces endometrial changes.
Selective norepinephrine reuptake inhibitor (NRI) that increases norepinephrine levels in the synaptic cleft, enhancing adrenergic transmission primarily in the descending pain pathways of the spinal cord.
One tablet orally once daily for 28 consecutive days per cycle.
400 mg orally once daily
None Documented
None Documented
Ethinylestradiol: terminal elimination half-life ~13-27 hours (mean ~17 hours); ethynodiol diacetate (as norethindrone): terminal elimination half-life ~8-11 hours; clinical context: achieved steady-state within 5-10 days; accumulation not significant due to dose interval.
Terminal half-life 12-15 hours; clinical context: supports twice-daily dosing in most patients.
Ethinylestradiol and ethynodiol diacetate are extensively metabolized; urinary excretion accounts for ~40% of ethinylestradiol metabolites and ~50-60% of ethynodiol diacetate metabolites; fecal excretion accounts for ~30% of ethinylestradiol metabolites and ~35% of ethynodiol diacetate metabolites; biliary excretion contributes to enterohepatic circulation.
Renal: 70% unchanged; biliary/fecal: 20% as metabolites; 10% in expired air.
Category C
Category C
Combination Oral Contraceptive
Combination Oral Contraceptive