Enclomiphene
Enclomiphene acts as an estrogen receptor antagonist primarily at hypothalamic and pituitary sites. By blocking estrogen-mediated negative feedback on GnRH neurons, it increases pulsatile GnRH secretion, which in turn elevates pituitary LH and FSH release. The resulting gonadotropin surge stimulates testicular Leydig cell testosterone production and may support spermatogenesis. Unlike the cis-isomer zuclomiphene, enclomiphene clears more rapidly, which is thought to reduce cumulative estrogenic side effects seen with the racemic mixture.
Injectable esters release over days to weeks depending on the ester; oral agents act within hours. Hormonal effects accrue over weeks, and dosing is individualized by a clinician.
Oral tablet or capsule (compounded); store at controlled room temperature in a dry location per compounding pharmacy labeling.
Clinical Evidence
What the literature says
Pharmacokinetics
- Routes
- Oral
Citations (3)
Last reviewed: 2026-06-15
Research Guide
How users approach this compound
The following reflects patterns observed in research literature and community protocols. This is not medical advice and does not constitute a clinical recommendation.
Reported Uses
- Investigated in Phase 2/3 trials for secondary (hypogonadotropic) hypogonadism in males
- Studied as an alternative to exogenous testosterone in men wishing to preserve fertility
Key Research Benefits
- Studied for raising endogenous LH, FSH, and testosterone in males with secondary hypogonadism while potentially preserving spermatogenesis, based on clinical trial data
Potential Side Effects
Considerations and Cautions
- Not FDA-approved; use is off-label and subject to compounding pharmacy regulations
- Estrogen-sensitive conditions
- Pregnancy (SERM class risk)
- Limited long-term safety data
Labs to monitor
Educational context only, not a testing mandate. Any bloodwork decisions belong with your clinician.
- Estradiol (E2): SERM mechanism affects estrogen feedback; E2 monitoring guides adequacy and avoids estrogen deficiency.
- LH and FSH: Primary pharmacodynamic endpoints confirming gonadotropin response to SERM blockade.
- Lipid panel: SERMs can affect lipid metabolism; baseline and follow-up monitoring prudent.
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Not medical advice
Information on DoseVault is for educational purposes only and is not a substitute for medical advice, diagnosis, or treatment from a qualified healthcare provider.