Semax

ACTH (4–10) analog · heptapeptide

Also known as the "Russian brain" peptide

A peptide studied for focus, mental clarity, and brain protection.

Not yet available

Pending FDA approval

Coming Soon Once Semax is FDA approved, you’ll be able to get a prescription and compare prices here on Rx.com. Browse available medications →

Semax is a synthetic peptide originally developed in Russia, where versions of it have been used and studied for cognitive and neurological purposes. It is based on a small fragment of ACTH (adrenocorticotropic hormone) modified to act on the brain without the hormone's other effects. In the U.S., Semax is investigational — it is not FDA approved and is not available through Rx.com.

What Semax is being researched for

People most often look into Semax in connection with the areas below. These are research directions — not approved or proven treatments.

Focus, attention & mental clarity
Memory and learning research
Stress and mood resilience
Neuroprotection & brain recovery
Mental energy and motivation

What is Semax?

Semax is a short peptide (a heptapeptide — seven amino acids) derived from a fragment of ACTH. It is classed as a nootropic, meaning it is studied for effects on thinking, focus and brain health. In Russia, related formulations have been studied for stroke recovery and cognitive support, which is a major reason for the worldwide interest.

How is Semax thought to work?

Research suggests Semax may influence BDNF (brain-derived neurotrophic factor) and other signals involved in the growth, protection and connectivity of brain cells. It is also studied for effects on attention and stress regulation. Most rigorous data comes from outside the U.S., and large Western clinical trials are limited, so benefits are not established here.

What is Semax being researched for?

Interest areas include focus and cognition, memory and learning, mood and stress resilience, and neuroprotection (including recovery after reduced blood flow to the brain). In the nootropic community it is popular for mental clarity. These are research directions, not FDA-approved uses, and Rx.com makes no efficacy claims.

Is Semax FDA approved or available?

No. Semax is not FDA approved in the United States and is not available to purchase or be prescribed through Rx.com. If it earns FDA approval in the future, Rx.com plans to help eligible patients compare prices and access it safely.

Frequently asked questions

Why is Semax called the "Russian brain" peptide?

Semax is often nicknamed the "Russian nootropic" or "Russian brain" peptide because it was developed in Russia, where versions have been studied and used for cognitive and neurological purposes. Its name even comes from the Russian for "seven amino acids." The nickname is informal, and Semax is not FDA approved in the United States.

Can I get Semax through Rx.com?

No. Semax is not FDA approved in the U.S. and is not available through Rx.com. This page is educational only.

What is Semax used for?

It is researched as a nootropic for focus, cognition, and neuroprotection. These uses are investigational and not FDA approved in the U.S.

Is Semax approved anywhere?

Versions of Semax have been used and studied in Russia, but it is not FDA approved in the United States.

When will Semax be available?

There is no confirmed U.S. date. It remains investigational and pending the standard FDA review process.

Medical disclaimer: The information on this page is provided for general educational purposes only and is not medical advice. This peptide is not approved by the U.S. Food and Drug Administration (FDA) and is not currently available to purchase or be prescribed through Rx.com. Statements here have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease. Always talk to a licensed healthcare professional before considering any new therapy.