Enclomiphene or Clomid With a GLP-1: A Fertility-Sparing TRT Alternative

Enclomiphene and clomiphene (Clomid) are offered to men with low testosterone who still want children because, unlike testosterone therapy, they raise the body's own testosterone without shutting down sperm production. Neither is FDA-approved for men: clomiphene's label covers ovulation problems in women, and enclomiphene has no approved product at all, so it reaches patients only through compounding pharmacies. There are no studies of either drug combined with a GLP-1.

Why testosterone therapy and fertility clash

Your testes make testosterone and sperm on instructions from two pituitary hormones, LH and FSH. When testosterone comes from a gel or injection, the brain senses plenty of it and turns those signals down. Blood testosterone goes up, but the testes lose the signal they need for sperm production.

That is why the Endocrine Society's 2018 guideline on testosterone therapy states: "We recommend against testosterone therapy in men planning fertility in the near term" (Bhasin et al., Endocrine Society guideline, JCEM 2018).

The phase 3 enclomiphene trials showed the effect directly. In overweight men aged 18 to 60 with low testosterone from a pituitary signaling problem (secondary hypogonadism), the group on testosterone gel saw LH and FSH fall over 16 weeks and had "a marked reduction in spermatogenesis" (Kim et al., BJU International 2016, phase 3 trials ZA-304 and ZA-305).

How SERMs work differently

Clomiphene and enclomiphene are selective estrogen receptor modulators (SERMs). In men, they block estrogen's "slow down" feedback at the brain, so the pituitary releases more LH and FSH. The testes respond by making more of their own testosterone, and sperm production keeps its signal.

In the same BJU International paper, both enclomiphene doses raised total testosterone, and LH and FSH rose instead of falling. The authors wrote that enclomiphene "maintained sperm concentration in the normal range over the treatment period" and described the approach as restoration rather than replacement. These were 16-week trials, and the abstract does not report pregnancy rates.

Clomid versus enclomiphene: what's the difference?

Clomiphene citrate is a mix of two mirror-image forms. The FDA label describes it as a mixture of zuclomiphene (cis) and enclomiphene (trans), with zuclomiphene making up 30% to 50%. Zuclomiphene has a longer half-life, and the label notes that detectable levels "persisted for longer than a month" in some subjects (Clomid prescribing information, DailyMed).

Enclomiphene is the trans form on its own. The sales pitch is that removing the longer-lasting zuclomiphene makes for a cleaner drug. That rationale is plausible, but no head-to-head trial cited here shows enclomiphene beats generic clomiphene on outcomes men care about.

Source: Endocrine Society 2018; Clomid label; BJU International; OPSS.

The regulatory facts, plainly

Clomiphene

The label's only indication is "the treatment of ovulatory dysfunction in women desiring pregnancy." It states there are no adequate or well-controlled studies showing effectiveness for male infertility, and notes reports of testicular tumors and gynecomastia in men using clomiphene, though a cause-and-effect link is not established (Clomid label).

Prescribing it for men is off-label use. The Endocrine Society notes that clomiphene "has been used empirically" in men with hypogonadotropic hypogonadism, but that "neither its efficacy nor its safety has been demonstrated in randomized trials" (Endocrine Society 2018).

Enclomiphene

The Department of Defense's Operation Supplement Safety program, in content current as of January 2026, states that enclomiphene "has not been approved by FDA for any use" and that its development as a drug was discontinued as of 2021 (OPSS).

So how do telehealth brands sell it? Under section 503A, pharmacies may compound with a bulk ingredient that has a USP monograph, is a component of an FDA-approved drug, or appears on FDA's 503A bulks list (FDA, Bulk Drug Substances Used in Compounding). OPSS explains that because enclomiphene is a component of approved clomiphene, it is eligible for 503A compounding with a valid prescription.

One more note for competitive athletes: OPSS lists clomiphene, and enclomiphene as a component of it, under section 4 of the WADA Prohibited List.

Pairing a SERM with a GLP-1

Men's health brands often bundle enclomiphene with a GLP-1. No published study has tested that combination, so there are no data on whether the two help or hinder each other.

One label point is relevant. GLP-1s slow stomach emptying, and the Zepbound label says this "has the potential to impact the absorption" of oral medicines taken at the same time (Zepbound prescribing information); the Wegovy label says the same (Wegovy prescribing information). Clomiphene and enclomiphene are oral pills. Whether that meaningfully changes their effect has not been studied, which is one more reason to judge the SERM by follow-up blood work rather than by how you feel.

Timing matters too. Your testosterone level may shift as you lose weight. Ask whether it makes sense to recheck testosterone after significant weight loss before committing to long-term hormone treatment of any kind.

Before you sign up for a bundle, find out which drugs are FDA-approved products and which are compounded, which pharmacy fills them, and which labs are included in the price.

What monitoring to expect

Source: Endocrine Society 2018; BJU International; Clomid label.

The Endocrine Society says the diagnosis should rest on fasting morning total testosterone, repeated to confirm, and that if fertility is a concern clinicians "should perform at least two semen analyses" separated by several weeks. The Clomid label says anyone with visual symptoms should stop treatment and have a prompt eye evaluation; it describes these as usually reversible, though prolonged cases have been reported.

Ask your prescriber whether they will also track estradiol and blood counts, and how often. Practice varies, and a telehealth plan that skips follow-up labs is a red flag.

Questions to bring to your prescriber

• Is my low testosterone primary (testicular) or secondary (pituitary signaling)? SERMs depend on working testes.
• Is the SERM you're offering generic clomiphene or compounded enclomiphene, and why that one?
• Which pharmacy compounds it, and is it a 503A pharmacy?
• When will you recheck testosterone, LH and FSH, and will you order a semen analysis?
• Should we recheck my testosterone after I've lost weight on the GLP-1?
• If I want a fertility specialist involved, who do you refer to?

Where this guide stops

This guide does not recommend a drug or dose and does not replace a fertility workup. The Endocrine Society notes that men with primary (testicular) hypogonadism do not regain fertility with gonadotropin therapy the way men with secondary hypogonadism can, so the cause of your low testosterone shapes every option. A urologist or reproductive endocrinologist is the right next stop if conception is a near-term goal.

Key takeaway: SERMs preserve the hormone signals that sperm production depends on, but clomiphene is off-label for men and enclomiphene is compounded and unapproved. Insist on proper diagnosis, semen testing and follow-up labs, and know exactly what is in any GLP-1 bundle.

Sources

1. Bhasin S et al. Testosterone Therapy in Men With Hypogonadism: An Endocrine Society Clinical Practice Guideline. J Clin Endocrinol Metab 2018;103(5):1715-1744
2. Kim ED et al. Oral enclomiphene citrate raises testosterone and preserves sperm counts in obese hypogonadal men, unlike topical testosterone: restoration instead of replacement. BJU Int 2016;117(4):677-685
3. Clomid (clomiphene citrate) prescribing information, DailyMed
4. Operation Supplement Safety (DoD): Clomiphene and enclomiphene are drugs, not dietary supplements
5. FDA: Bulk Drug Substances Used in Compounding
6. FDA: Compounding and the FDA, Questions and Answers
7. Zepbound (tirzepatide) prescribing information, Eli Lilly
8. Wegovy (semaglutide) prescribing information, Novo Nordisk

Medical disclaimer: This article is general information, not medical advice, and does not replace a licensed clinician who knows your history. Approvals, labels, coverage and prices change; check the linked sources and talk with your prescriber or pharmacist before making decisions about any medication.