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Enclomiphene vs Zuclomiphene: Drug Comparison

Compare common side effects, interactions, warnings, and more.

Medical Review byMike Bohl, MD, MBA, MPH, MS, ALMNov 12, 2025

Medication Name

Enclomiphene

*image for illustrative purpose only

Zuclomiphene

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Enclomiphene

*image for illustrative purpose only

Zuclomiphene

*image for illustrative purpose only

Summary

Prescription only

Enclomiphene is a non-steroidal selective estrogen receptor modulator (SERM) sometimes used to treat male secondary hypogonadism, or low testosterone caused by problems with the hypothalamus or pituitary gland. The medication is derived from another SERM called clomiphene citrate, and while enclomiphene is not approved by the United States Food and Drug Administration (FDA) to treat any condition on its own, it is available through compounding pharmacies.

Enclomiphene is designed to stimulate testosterone production while minimizing the estrogenic side effects sometimes seen with clomiphene, such as breast tissue growth. It works by blocking estrogen signals in the brain, which increases the release of certain hormones, like luteinizing hormone (LH) and follicle-stimulating hormone (FSH). These hormones then tell the testicles to produce more natural testosterone.

Enclomiphene is taken as a daily pill, usually in doses of 12.5 milligrams (mg) to 25 mg.

Enclomiphene boosts testosterone while helping the body maintain its natural hormone production and sperm count, making it a good alternative to traditional testosterone replacement therapies for men who want to preserve their fertility.

Prescription only

Zuclomiphene is one of two stereoisomers that make up the medication clomiphene (the other being enclomiphene). Clomiphene is FDA approved for the treatment of ovulatory dysfunction in women desiring pregnancy, and it is sometimes used off label in men with low testosterone. Zuclomiphene, on its own, is not used as a medication for any medical condition.

Drug Category

Selective estrogen receptor modulator

Nonsteroidal triphenylethylene derivative with selective estrogen receptor modulator-like properties

Approved Uses

Enclomiphene is not approved as a drug in the United States

Zuclomiphene is not approved as a drug in the United States

Dosage

  • Typically taken orally

  • Often prescribed at 6.25 mg, 12.5 mg, and 25 mg doses

Information about zuclomiphene is limited

Known Common Side Effects

Information about enclomiphene is limited

Information about zuclomiphene is limited

Interactions & Contraindications

Information about enclomiphene is limited

Information about zuclomiphene is limited

Warnings & Precautions

Information about enclomiphene is limited

Information about zuclomiphene is limited

References

Information about enclomiphene is limited. It is the active isomer of clomiphene.

*Information about zuclomiphene is limited

The information provided here is NOT MEDICAL ADVICE and is for informational and educational purposes only. The drug comparison tool does not determine eligibility for medications or treatments provided via the Hims/Hers platform. Consultation with a healthcare provider is required to assess suitability for any medical treatment based on individual health and medical history. All product names and associated trademarks are the property of their respective owners.