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Enclomiphene

A daily pill that raises a man's own testosterone while keeping his fertility.

Updated 03 May 2026Read 3 minBacked by 60 studies

The quick version

What it is: A pill that makes your body raise its own testosterone
Is it FDA-approved?: No. The FDA said no in 2016 over study design, not safety
How strong is the proof?: Strong: two big human trials
How you take it: A pill you swallow once a day
Typical result: Higher testosterone in 4 to 6 weeks, sperm kept intact
Biggest catch: Any vision change means stop and see an eye doctor

Any word with a dotted underline is a science word — tap it for a plain-English meaning.

In plain words.

Enclomiphene is a daily pill. It is not really a , but it lives in the same low-testosterone toolkit, so we cover it here.

It is a type of drug called a SERM (a medicine that blocks estrogen in some places in the body). By blocking an estrogen signal in the brain, it tricks the brain into telling the body to make more testosterone.

Normal testosterone shots (TRT) add testosterone from outside. That shuts down your own supply and can shrink fertility. Enclomiphene does the opposite. It pushes your own body to make more, so you keep making sperm.

What people use it for.

Men use enclomiphene when their testosterone is low but they still want kids someday. It raises testosterone without killing fertility.

It is also used by men coming off a steroid , to help restart their natural testosterone.

It only works if the problem is in the brain's signal, not the testicles themselves. If your testicles have failed, this will not fix it.

Does it actually work?

Yes, the proof here is strong. This is one of the better-studied options on the site.

A company called Repros ran two big trials (named ZA-301 and ZA-302). They showed enclomiphene raised testosterone while keeping sperm counts up. Regular testosterone shots do the opposite and lower sperm.

The FDA turned it down in 2016. But that was about how the trials were designed, not about safety. Doctors still prescribe it through compounding pharmacies. Testosterone usually rises within 4 to 6 weeks. Sperm changes take 3 to 6 months.

what you’ve probably heard.

The claims floating around online, and how true they actually are.

“Enclomiphene raises your testosterone without wrecking your fertility.”

mostly true

Two big trials showed it raises testosterone while keeping sperm counts up, the opposite of what plain testosterone shots do. It only works if the low signal starts in the brain, not the testicles.

“The FDA rejected it, so it must be unsafe.”

myth

The 2016 rejection was about how the trials were designed, not about safety. Doctors still prescribe it through compounding pharmacies.

“It's the same thing as Clomid.”

half true

Clomid is a related drug, but not the same one. It is a blend of two mirror-image molecules, and enclomiphene is just one of them, taken on its own.

“It's a safe over-the-counter test booster you can just take.”

It needs a doctor watching your blood and your eyes. Any vision change, like floaters or flashing lights, means stop and see an eye doctor before restarting.

How you take it.

You take it as a pill, once a day. That is the whole routine.

A common dose is around 12.5 mg a day, but your clinic sets the exact amount and checks your bloodwork.

Give it time. Testosterone moves in about 4 to 6 weeks. If it has not budged by 8 weeks, it is probably not working for you, and it is time to stop.

What to watch out for.

The serious stuff

Vision changes are the big one. If you get floaters, flashing lights, blurry or shimmery vision, or blind spots, stop the pill and see an eye doctor before restarting. SERMs like this one have caused eye-nerve problems in some people. Do not read past this warning.
Do not use it if you or your family has had an estrogen-driven cancer or a blood clot problem.
Do not mix it with testosterone shots. They fight each other, and you get neither effect cleanly.

The common stuff

Some men get a low or irritable mood. It is not common, but it is real. If your mood starts dropping, tell someone and tell your doctor.

If anything feels wrong, talk to a real doctor. We are not your doctor.

Where people get it.

Here are the lanes, safest to riskiest.

Brand. None. The FDA rejected the brand version in 2016. Note: regular Clomid is a different, related drug, not the same thing.
. This is the main and safest path, about $50 to $90 a month, through men's-health and TRT clinics. Widely stocked.
Research-only (). A smaller market, about $30 to $60 a month. Cheaper, but no promise of what is in the vial, and no doctor watching your labs.
. Basically nonexistent here, because the path is already cheap.

The clinic path is clearly best, because this drug needs blood and eye monitoring.

Our honest take.

Yes, for the right man

If your testosterone is low because the brain signal is low, and you want to keep your fertility, this is a smart tool. Get it from a men's-health clinic that watches your labs.

Skip it if your testosterone is already normal and you just want a "boost." That is not what this is for, and the risks are not worth it. Also skip the self-bought research version. This drug needs a doctor checking your testosterone, estrogen, blood, eyes, and mood.

If you start, treat it like the real prescription it is. Get the monitoring. Stop at any vision change.

The studies behind this.

We read the research so you don't have to. Here's where the facts on this page come from.

Learn about these too.

Wet · further upstream

We're not your doctor, and this isn't medical advice. It's a plain-English summary of what the research says, so you can have a smarter conversation with someone who is.

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