Comparative Pharmacology
Head-to-head clinical analysis: DROSPIRENONE ETHINYL ESTRADIOL AND LEVOMEFOLATE CALCIUM versus MEGACE ES.
Peer-Reviewed Evidence
Head-to-head clinical analysis: DROSPIRENONE ETHINYL ESTRADIOL AND LEVOMEFOLATE CALCIUM versus MEGACE ES.
DROSPIRENONE, ETHINYL ESTRADIOL AND LEVOMEFOLATE CALCIUM vs MEGACE ES
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Combination of drospirenone (a progestin with antimineralocorticoid and antiandrogenic activity), ethinyl estradiol (an estrogen), and levomefolate calcium (a folate supplement). Prevents ovulation by suppressing gonadotropins; increases cervical mucus viscosity, inhibiting sperm penetration; levomefolate provides folate to reduce neural tube defect risk.
Megestrol acetate is a synthetic progestin that inhibits pituitary gonadotropin secretion, leading to suppression of ovarian and testicular hormone production. It also has antineoplastic effects possibly through local action on hormone-sensitive tissues and stimulates appetite via modulation of neuropeptide Y and other appetite-regulating factors.
One tablet orally once daily for 28 days (21 active tablets containing drospirenone 3 mg, ethinyl estradiol 0.02 mg, and levomefolate calcium 0.451 mg, followed by 7 placebo tablets containing levomefolate calcium 0.451 mg).
625 mg orally once daily (MEGACE ES suspension contains 625 mg/5 mL; shake well before use). For appetite stimulation in cachexia.
None Documented
None Documented
Drospirenone: ~30 hours (steady state achieved after 8 days). Ethinyl estradiol: ~13-17 hours (biphasic, terminal). Levomefolate calcium: ~4-6 hours (folate derivatives have longer retention).
Approximately 34 hours in plasma; steady-state achieved after 2-3 weeks of daily dosing.
Drospirenone: ~50% renal (as metabolites), ~40% fecal. Ethinyl estradiol: ~40% renal, ~60% fecal. Levomefolate calcium: ~70% renal (as folate metabolites), ~30% fecal.
Primarily renal (≤1% unchanged) and biliary; extensive metabolism to inactive glucuronide conjugates excreted in feces.
Category D/X
Category C
Progestin + Estrogen
Progestin