Anastrozole vs Clomiphene Citrate
A side-by-side research comparison of Anastrozole and Clomiphene Citrate across mechanism, dosing, half-life, benefits, side effects and research status.
Comparison table
| Attribute | Anastrozole | Clomiphene Citrate |
|---|---|---|
| Full name | Anastrozole (Arimidex) | Clomiphene Citrate (Clomid) |
| Category | Hormone Replacement | Hormone Replacement |
| Status | FDA-approved prescription | FDA Approved (off-label for men) |
| Mechanism | Selectively and reversibly inhibits aromatase (CYP19A1), the enzyme that converts androgens to estrogens. Reduces circulating estradiol levels without affecting other steroid pathways. | Blocks estrogen receptors in the hypothalamus, preventing negative feedback. This increases GnRH pulsatility, elevating pituitary LH and FSH output and subsequently testicular testosterone production. |
| Molecular weight | 293.37 Da | 598.09 Da (citrate salt) |
| Half-life | ~46.8 hours | ~5-7 days |
| Bioavailability | ~80-85% oral | ~80% oral |
| Typical dose | 0.25-0.5 mg | 12.5-50 mg |
| Frequency | 2-3x per week | Daily or every other day |
| Route | Oral tablet | Oral |
Anastrozole reported benefits
- Estrogen control
- Reduced water retention
- Prevention of gynecomastia
- Maintained testosterone ratio
- Improved body composition
Clomiphene Citrate reported benefits
- Increased endogenous testosterone
- Preserved fertility
- Elevated LH/FSH
- No testicular atrophy
- Improved sperm parameters
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Research and educational reference only. Not medical advice.