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GENITO URINARY SYSTEM AND SEX HORMONES › SEX HORMONES AND MODULATORS OF THE GENITAL SYSTEM › PROGESTOGENS AND ESTROGENS IN COMBINATION › Progestogens and estrogens, fixed combinations
methylnortestosterone and estrogen
G03FA05
Forms & Strengths
- Combination formulations of methylnortestosterone (Trestolone) and estrogen are primarily investigated or compounded and lack standardized commercial oral/parenteral dosage forms in most major markets.
Adult Dosing
- No standardized FDA-approved adult dosing exists due to investigational and non-standardized clinical use.
- Historically evaluated in clinical settings for hormone replacement or advanced indications under specific investigational protocols.
Pediatric Dosing
- Not indicated for pediatric use.
Indications
- Investigational male contraception.
- Hormone replacement therapy in specific experimental or specialized clinical contexts.
Mechanism of Action
- Methylnortestosterone acts as a potent synthetic androgen and anabolic steroid suppressing gonadotropin secretion, leading to inhibition of spermatogenesis.
- Estrogen component provides necessary physiological sex steroid support to prevent hypoestrogenic side effects such as bone mineral density loss.
Contraindications
- Known or suspected carcinoma of the breast or prostate.
- Pregnancy or women who may become pregnant (teratogenicity risk).
- Active or history of venous thromboembolism or thromboembolic disorders.
- Undiagnosed abnormal genital bleeding.
- Active severe hepatic disease or impairment.
Adverse Reactions
- Hepatic enzyme elevation and hepatotoxicity with alkylated androgens.
- Fluid retention, edema, and hypertension.
- Thromboembolic events related to estrogen exposure.
- Lipid profile alterations (decreased HDL, increased LDL).
- Mood changes, acne, and androgenic side effects in sensitive individuals.
Drug Interactions
- Anticoagulants: Estrogens may diminish the efficacy of oral anticoagulants.
- Hepatotoxic drugs: Concurrent use increases the risk of liver injury.
- Insulin and oral antidiabetic agents: Androgens and estrogens can alter glucose tolerance and insulin requirements.
- CYP3A4 inducers/inhibitors: May alter the metabolism of steroid hormone components.
Curated Content: Needs Vetting Before Put to Clinical Use