Oxandrolone vs Tamoxifen
Well Studied vs FDA Approved
avoid Mechanism-based · 64% Both Oxandrolone and Tamoxifen carry hepatotoxic risk. Combining hepatotoxic compounds significantly increases liver damage potential. If unavoidable, include liver support (TUDCA/NAC) and monitor ALT/AST frequently.
Molecular Data
Oxandrolone Tamoxifen
Weight 306.44 Da 371.51 Da
Half-life ~9-10 hours ~5-7 days
Type 17-alpha-alkylated anabolic-androgenic steroid (C19H30O3) Triphenylethylene-derived selective estrogen receptor modulator
Key Benefits
Oxandrolone
01 Promotes lean muscle mass gains with minimal water retention
02 Supports recovery of lost body weight following surgery, trauma, or chronic illness
03 Reduces bone pain associated with osteoporosis and improves bone mineral density
04 Does not aromatize to estrogen, avoiding estrogen-related side effects
05 Well-studied safety profile in women, children, and burn patients
06 Enhances nitrogen retention and protein synthesis during caloric deficit
07 Attenuates glucocorticoid-induced catabolism in post-surgical and burn patients
08 Lower androgenic potency compared to most oral anabolic steroids
Tamoxifen
01 Blocks estrogen receptor signaling in breast tissue, preventing and treating gynecomastia
02 Stimulates LH and FSH production by antagonizing hypothalamic estrogen receptors
03 Restores endogenous testosterone production during post-cycle therapy
04 Partial estrogen agonist activity in bone preserves bone mineral density
05 Extremely long half-life allows for flexible dosing schedules
06 Decades of clinical use with a well-characterized safety and efficacy profile
07 Oral administration with no injections or reconstitution required
Side Effects
Oxandrolone
HDL cholesterol suppression (dose-dependent, most significant lipid effect)
LDL cholesterol elevation
Mild hepatic stress (elevated liver enzymes ALT/AST)
Suppression of endogenous testosterone production
Mild headaches
Nausea or gastrointestinal discomfort
Changes in libido (increase or decrease depending on hormonal context)
Oily skin and mild acne
Tamoxifen
Hot flashes and night sweats
Nausea or gastrointestinal discomfort
Mood swings, irritability, or emotional lability
Fatigue during initial weeks of use
Headache
Contraindications
Known or suspected prostate cancer
Breast cancer in males
Breast cancer with hypercalcemia in females
Pregnancy (Category X - known to cause fetal harm)
Nephrosis or nephrotic phase of nephritis
Hypercalcemia
Severe hepatic dysfunction or active liver disease
Hypersensitivity to oxandrolone or any formulation component
History of deep vein thrombosis, pulmonary embolism, or other thromboembolic events
Known hypersensitivity to tamoxifen citrate or any excipients
Concurrent warfarin or coumarin-type anticoagulant therapy (increased bleeding risk)
Pregnancy or planned pregnancy (category D -- known teratogenic risk)
Pre-existing endometrial hyperplasia or uterine cancer
Severe hepatic impairment
Research Evidence
Oxandrolone Tamoxifen
Status Well Studied FDA Approved
References 5 studies 5 studies
Latest September 2023 —
FDA Approved Yes Yes
This comparison is for educational and research purposes only. Consult a healthcare professional before use.