Enclomiphene vs Clomiphene for Men: Approval, Side Effects, Cost

Both pills raise a man's own testosterone instead of adding it. This guide compares what each is, what the approval status means, what studies found, and what each costs online. We list prices only, never doses. Every price we track is on our testosterone price page.

Clomid vs enclomiphene: what each one is

Clomiphene citrate is an old fertility drug for women. Its label says it "is a mixture of two geometric isomers Z (or cis) and E (or trans) containing between 30% and 50% of the Z-isomer." (DailyMed: clomiphene citrate label, read 14 November 2026) An isomer is a version of a molecule with the same parts arranged differently, like a left and right glove.

The two forms have names. The Z form is zuclomiphene. The E form is enclomiphene. So enclomiphene is the E half of clomiphene, sold on its own.

The two halves act differently. The label says "Some data suggest that zuclomiphene has greater estrogenic activity than enclomiphene." Estrogenic means it acts like estrogen. The label also says zuclomiphene "has a longer half-life than enclomiphene" and that "Detectable levels of zuclomiphene persisted for longer than a month" in volunteers. In plain words, the Z half lasts longer in the body and acts more like estrogen. The idea behind enclomiphene is to keep the useful half and drop that one.

How both raise testosterone

Both work the same basic way. They block estrogen's signal at the brain. The brain then sends more LH and FSH, the hormones that tell the testes to make testosterone and sperm. Testosterone therapy does the opposite: it adds testosterone from outside, which can shut down the body's own production.

That is why both drugs suit a specific man. They only help when the testes still work and the signal from the brain is low, called secondary hypogonadism. Rugiet's page says enclomiphene "is not effective for men who have a diagnosis of primary hypogonadism" (Rugiet enclomiphene, read 14 November 2026). The same logic applies to clomiphene. Labs decide which kind you have.

Approval status

The clomiphene label says it "is indicated for the treatment of ovulatory dysfunction in women desiring pregnancy." Prescribing it to men is off-label, which means the drug is approved for other uses and a clinician chooses to use it this way. That is legal and common.

Enclomiphene has no approved product. We found none listed in Drugs@FDA on 14 November 2026. Programs sell it compounded. Rugiet's page says "Compounded drugs are not approved by the FDA and do not undergo review or verification by FDA for safety, effectiveness, or quality." (Rugiet enclomiphene)

So the trade-off is real. Clomiphene is an approved, quality-checked tablet used off-label. Enclomiphene is the cleaner molecule, but every version sold online is mixed by a compounding pharmacy.

What the studies found

Head to head. A 2024 study at one US academic clinic followed 66 men who took clomiphene and later switched to enclomiphene. Testosterone rose on both. Side effects were less common on enclomiphene, "including decreased libido (P=0.001), reduced energy (P=0.044), and mood changes (P=0.03)" (Translational Andrology and Urology, 2024). Estradiol, the main estrogen in men, rose less on enclomiphene. This study looked back at records, so it is weaker than a trial that assigns drugs at random.

Pooled trials. A 2025 review combined the results of trials of both drugs. It found they "significantly improved levels of TT, LH, and FSH in hypogonadal men compared to placebo" (Archives of Endocrinology and Metabolism, 2025). TT is total testosterone and a placebo is a dummy pill. It also found "No significant difference in TT was observed between the SERM and T gel groups." SERM is the drug class both belong to.

Clomiphene over a year. A 2025 study in Japan followed 54 men on clomiphene for up to a year. Testosterone "increased and remained high over 1 year," but the sexual-function score "did not show significant improvement" (International Journal of Urology).

Side effects compared

Clomiphene has a full label, written for women. Its best-known warning covers vision: "blurring or other visual symptoms such as spots or flashes (scintillating scotomata) may occasionally occur" (DailyMed: clomiphene citrate label). The label says these can, in some cases, last.

Enclomiphene has no label. Sellers list headache, nausea, hot flashes, mood changes and visual symptoms. Our enclomiphene side effects guide quotes each seller's list. Vision changes on either drug need a call to the prescriber the same day.

Clomiphene vs enclomiphene: cost online

Prices come from each seller's own page, with the date we read it.

Hone lists both drugs side by side, so its prices are the cleanest comparison: the clomiphene line is a little cheaper, and both need the membership. Rex MD's page says the monthly subscription "includes medication cost" and that the price depends on "which medication is prescribed" (Rex MD).

Generic clomiphene tablets are also sold at cash pharmacies with your own doctor's prescription. Our ranked list of online low testosterone programs scores every seller, and our clomiphene for men guide covers Clomid on its own.