Comparative Pharmacology
Head-to-head clinical analysis: FLUOXYMESTERONE versus TESTOSTERONE ENANTHATE AND ESTRADIOL VALERATE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: FLUOXYMESTERONE versus TESTOSTERONE ENANTHATE AND ESTRADIOL VALERATE.
FLUOXYMESTERONE vs TESTOSTERONE ENANTHATE AND ESTRADIOL VALERATE
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Synthetic androgen receptor agonist; binds to androgen receptors, modulating gene expression and promoting protein synthesis, muscle growth, and secondary sexual characteristic development.
Testosterone enanthate is a prodrug of testosterone, which binds to androgen receptors, activating gene transcription that leads to development of male secondary sex characteristics and anabolic effects. Estradiol valerate is a prodrug of estradiol, which binds to estrogen receptors, promoting growth and development of female reproductive tissues and secondary sex characteristics.
Adults: 5-20 mg orally once daily. For replacement therapy, 5-10 mg daily; for hypogonadism, 5-20 mg daily for several months.
1 to 2 mL of a combination product containing 90 mg testosterone enanthate and 4 mg estradiol valerate per mL intramuscularly every 4 weeks.
None Documented
None Documented
Clinical Note
moderateAcarbose + Fluoxymesterone
"Acarbose may increase the hypoglycemic activities of Fluoxymesterone."
Clinical Note
moderateSunitinib + Fluoxymesterone
"Sunitinib may increase the hypoglycemic activities of Fluoxymesterone."
Clinical Note
moderatePrednisolone + Fluoxymesterone
"Prednisolone may increase the fluid retaining activities of Fluoxymesterone."
Clinical Note
moderateDexamethasone + Fluoxymesterone
Terminal elimination half-life: 9.2 hours; clinical context: supports once-daily dosing for androgen replacement, with steady-state achieved in ~2 days
Testosterone enanthate: 4-5 days (IM). Estradiol valerate: 2-3 days (IM). Steady-state reached in ~2-3 weeks.
Renal: 90% as glucuronide and sulfate conjugates; fecal: 10%
Testosterone enanthate and estradiol valerate are metabolized in the liver. Testosterone metabolites (e.g., androsterone, etiocholanolone) are conjugated and excreted renally (90%) and fecally (~10%). Estradiol valerate is hydrolyzed to estradiol, metabolized to estrone and estriol, conjugated, and excreted primarily renally (70-80%) with ~20% biliary/fecal.
Category C
Category D/X
Androgen
Androgen
"Dexamethasone may increase the fluid retaining activities of Fluoxymesterone."