Enclomiphene is not a SARM. It belongs to a completely different drug class called selective estrogen receptor modulators (SERMs). The confusion is understandable because both compounds are popular in fitness and hormone optimization circles, and both affect testosterone levels. But they work through entirely different mechanisms, target different receptors, and have opposite effects on your body’s natural hormone production.
What Enclomiphene Actually Is
Enclomiphene is a non-steroidal estrogen receptor antagonist. It’s one of the two isomers found in clomiphene (Clomid), isolated because it’s the more potent half for boosting testosterone in men. Its commercial name is Androxal, and it was developed specifically to treat secondary hypogonadism, a condition where the brain’s signaling to the testes is impaired, resulting in low testosterone.
The drug works by blocking estrogen receptors in the hypothalamus, the part of the brain that monitors hormone levels. Normally, estrogen signals the brain that there’s enough testosterone circulating (since testosterone converts to estrogen naturally). Enclomiphene blocks that signal, so the brain thinks estrogen is low and responds by releasing more luteinizing hormone (LH) and follicle-stimulating hormone (FSH). These hormones travel to the testes and stimulate them to produce more testosterone. In clinical studies, enclomiphene consistently raised total testosterone into the normal range within two weeks.
What SARMs Are and Why They’re Different
SARMs, or selective androgen receptor modulators, are small molecule drugs that bind directly to androgen receptors in tissues like muscle and bone. Once inside a cell, a SARM enters the cytoplasm, latches onto the androgen receptor, and travels to the nucleus where it influences gene activity related to muscle growth and bone density. They’re designed to mimic the effects of testosterone in specific tissues while theoretically avoiding side effects in others like the prostate or liver.
The key distinction: SARMs act like synthetic testosterone at the receptor level. Enclomiphene never touches the androgen receptor at all. PubChem’s classification of clomiphene explicitly notes it has “no apparent androgenic or antiandrogenic effects.” It operates entirely through estrogen receptors in the brain.
Opposite Effects on Natural Testosterone
This is the most practically important difference between the two. Enclomiphene stimulates your body’s own testosterone production by increasing LH and FSH. SARMs do the opposite. Because SARMs activate androgen receptors directly, the brain detects that androgenic activity and dials down its own LH and FSH output. The result is suppressed natural testosterone production, which is why SARM users often need post-cycle therapy to restart their hormonal axis.
Enclomiphene is sometimes used as that post-cycle therapy. In clinical trials comparing enclomiphene to testosterone gel, both raised total testosterone levels within two weeks, but they had opposite effects on the hormones that drive sperm production. Enclomiphene increased LH and FSH levels, while exogenous testosterone suppressed them. This means enclomiphene preserves (and can even improve) sperm counts, while SARMs and testosterone replacement both carry risks of reduced fertility.
Why People Confuse the Two
Both enclomiphene and SARMs are sold through similar channels online, often marketed to the same audience of men looking to optimize testosterone, build muscle, or recover from steroid cycles. They’re both oral compounds. They both affect testosterone-related outcomes. And neither is currently FDA-approved for the uses most people buy them for, which places them in a regulatory gray area that blurs the lines further.
The fitness community also tends to lump anything that boosts testosterone or muscle into broad categories. You’ll see enclomiphene discussed alongside SARMs, peptides, and prohormones in the same forums, which creates the impression they’re all in the same family. They’re not. A SERM like enclomiphene is to a SARM what a thermostat is to a space heater. One adjusts your body’s own system; the other adds external heat.
Different Risk Profiles
Because they work through different pathways, enclomiphene and SARMs carry different risks. In clinical studies, enclomiphene did not significantly affect thyroid function, cortisol, lipids, or bone markers. It did lower insulin-like growth factor-1 levels, but it left most other metabolic markers untouched.
SARMs, by contrast, have been associated with liver toxicity, lipid disruption (particularly drops in HDL cholesterol), and hormonal suppression that can take weeks or months to recover from. Because most SARMs have never completed full clinical trials, their long-term safety data is limited. Many products sold as SARMs online have also been found to contain unlisted ingredients or different compounds entirely, adding another layer of unpredictability.
Enclomiphene’s side effect profile more closely resembles that of other SERMs like tamoxifen or clomiphene. Potential issues include visual disturbances, hot flashes, and mood changes, though the isolated enclomiphene isomer appears to be better tolerated than the mixed clomiphene compound used in Clomid.
Quick Comparison
- Drug class: Enclomiphene is a SERM (estrogen receptor modulator). SARMs are androgen receptor modulators.
- Target receptor: Enclomiphene blocks estrogen receptors in the brain. SARMs activate androgen receptors in muscle and bone.
- Effect on natural testosterone: Enclomiphene increases it by raising LH and FSH. SARMs suppress it.
- Effect on fertility: Enclomiphene preserves or improves sperm production. SARMs reduce it.
- Primary medical use: Enclomiphene treats secondary hypogonadism in men. SARMs were developed for muscle wasting and osteoporosis but remain largely experimental.