Comparative Pharmacology
Head-to-head clinical analysis: HER STYLE versus SEASONALE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: HER STYLE versus SEASONALE.
HER STYLE vs SEASONALE
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
HER STYLE is a hormonal contraceptive containing ethinyl estradiol and levonorgestrel. It inhibits ovulation by suppressing gonadotropin-releasing hormone (GnRH) from the hypothalamus, reducing follicle-stimulating hormone (FSH) and luteinizing hormone (LH) secretion. It also thickens cervical mucus to impede sperm penetration and alters endometrial lining to prevent implantation.
Seasonale is a combination oral contraceptive containing ethinyl estradiol and levonorgestrel. It suppresses gonadotropin release, inhibiting ovulation, and alters cervical mucus to reduce sperm penetration and endometrial lining to reduce implantation.
Not applicable. HER STYLE is not a recognized pharmaceutical agent; no standard dosing available.
One tablet (0.03 mg ethinyl estradiol and 0.15 mg levonorgestrel) orally once daily for 84 consecutive days, followed by 7 days of placebo.
None Documented
None Documented
Terminal half-life: 12 hours (range 10–14 hours). Clinical context: Allows twice-daily dosing; steady-state achieved in ~2.5 days.
Ethinyl estradiol: terminal half-life 13-27 hours (mean 17 hours); levonorgestrel: terminal half-life 11-45 hours (mean 25 hours). Clinical context: Supports once-daily dosing; steady-state achieved within 5-10 days.
Renal: 70% unchanged; Fecal: 20% as metabolites; Biliary: 10%.
Renal excretion of metabolites (approximately 50-60% as glucuronide and sulfate conjugates of ethinyl estradiol and levonorgestrel) and fecal elimination (approximately 40-50%).
Category C
Category C
Contraceptive
Contraceptive, Combination Hormonal