Semax

Semax is a small brain peptide. It is made of seven amino acids.

It comes from a piece of a stress hormone called ACTH. Scientists removed the hormone part and kept the brain part. It was made by the same Russian lab that made Selank.

In Russia it is an approved medicine, going back to 1997, stocked in regular hospitals the way an everyday prescription drug is here. Doctors there use it for stroke recovery and for ADHD in kids.

Outside Russia, it is not a medicine. It is sold "for research only." So you are looking at a drug with a real track record in one country and almost none anywhere else.

In Russia, doctors use it for recovery after a stroke or a head injury, and for ADHD in children.

Outside Russia, people mostly try it for focus and mental clarity. It is popular with tech workers, finance folks, and students who want something that is not another stimulant.

Honest note: a healthy adult using it for "focus" is far outside what the real trials studied. The trials were about brain injury, not sharpening a healthy brain.

Maybe, after a brain injury, but every bit of that comes from Russian trials nobody outside has been able to vet.

There are zero English-language randomized trials. The Russian studies looked at stroke and at ADHD in kids. There are about 60 animal studies. But like Selank, it is hard to check how those Russian trials were run from outside.

There is also a name trap. Three different molecules get sold as "Semax": plain Semax, N-acetyl Semax, and N-acetyl Semax amidate. The Russian trial proof is for plain Semax only. Most sellers actually ship the amidate version, which was not the one in the trials.

You take it in the nose, as a spray. That is the route the Russian studies used.

Watch the dose gap. Russian stroke trials used 1,000 mcg a day or more. The common online dose is only about 300 mcg a day, roughly one-third of the trial amount. So the gym dose is much smaller than the studied dose, and that gap is not written on any bottle.

Do not inject it. The data is for the nose route. If you mix RUO powder into a nose spray yourself, you must keep it clean. Your nose is a fast route to your blood, so a dirty mix is a real risk, not a small detail.

The serious stuff

Keep it away from drugs that push brain chemicals: antidepressants (SSRIs, SNRIs, MAOIs), tramadol, triptans, lithium, and stimulants. The Russian reports say Semax nudges both serotonin and dopamine, so pairing it with a stimulant or an antidepressant stacks an untested risk on top of an untested drug.

If you DIY a nose spray from powder, contamination is a real worry. The sealed Russian product is sterile. Your kitchen mix is not. Use clean, careful technique.

The common stuff

The Russian reports did not flag major side effects. But that is one country's papers, not a proven global safety record.

Talk to a real doctor, especially if you take any mental-health medicine or have a brain diagnosis. We are not your doctor.

Here are the lanes from safest to riskiest.

• Brand (Russia). A real approved product, about $30 to $60 a month at Russian retail. But bringing it into the US is legally restricted.
• Compounded. A few US pharmacies make it, about $90 to $220 a month, usually as a nose spray. This is the closest US-legal match.
• Research-only (RUO). The main lane outside Russia, about $25 to $70 a month. Sold "for research only." You usually mix your own nose spray.
• Gray market. Overseas raw powder, about $7 to $9 a month. Unregulated import.

Read the label closely. Make sure you know which of the three versions you are buying, because only plain Semax has the trial evidence.