Legal status · United States
Is Semax / Selank legal in the United States?
Written by Aaron CuhaReviewed Sep 2026
Direct answer
No. Semax / Selank is not an approved medicine in the United States; its classification is "Not approved; research use only". Nothing containing it is authorized for any use in people. Vials labeled "for research use only" are not exempt: that label does not make human use lawful. On the evidence, 2 human studies are cited on its profile.
Semax / Selank in the United States at a glance
| Classification | Not approved; research use only |
|---|---|
| Note | Neither peptide is FDA-approved. Semax was removed from FDA Category 2 in April 2026 and the Pharmacy Compounding Advisory Committee voted to recommend it for compounding in July 2026; that vote is advisory and no rulemaking has followed. |
| FDA approval status | Not approved as a blend or as single agents. Both are registered medicines in Russia; neither has FDA or EMA approval, and no combination product is registered anywhere. |
| Human studies cited | 2 of 5 citations on the profile |
| Reviewed | Sep 2026 |
Classification and note come from the Semax / Selank profile, checked against U.S. Food and Drug Administration (FDA) listings at the reviewed date.
What this means
- 01
No product containing Semax / Selank is approved by FDA for any use in the United States, so nothing on the market is authorized for people.
- 02
"Research use only" is a vendor label, not a legal category that permits human use. It does not exempt a product from medicines law.
- 03
Importing, supplying or promoting it for human use can fall under medicines legislation in the United States. This page is general information, not legal advice.
What Semax / Selank is
Two Russian peptides sold as a pair, either as separate nasal sprays or as one combined bottle, on the pitch that one sharpens and the other calms. No study has tested them together. The single products have Russian clinical data, 110 stroke patients for Semax and 62 anxiety patients for Selank, and neither was blinded against placebo. A combined spray at 2.5 mg per mL of each inverts the ratio the two are registered at in Russia.
Semax and Selank are the two peptides that came out of the same Russian institutional programme and ended up in the same medicine cabinet. Semax is a synthetic analogue of ACTH 4-10 registered in Russia and Ukraine for stroke recovery and cognitive disorders.
Mechanism: Semax, an ACTH 4-10 analogue with added residues for stability, raises BDNF and NGF expression and modulates melanocortin and dopaminergic signalling; in rats a single dose raised hippocampal BDNF protein and trkB phosphorylation. Selank, a tuftsin analogue, modulates GABA and monoamine systems and influences enkephalin degradation and BDNF expression, producing anxiolysis without the sedation profile of benzodiazepines.
Regulatory history: Not approved as a blend or as single agents. Both are registered medicines in Russia; neither has FDA or EMA approval, and no combination product is registered anywhere.
How FDA treats this kind of product
Approves prescription drugs by indication and polices unapproved products, including peptides sold online. Compounding pharmacies may prepare some compounds under a prescription when the FDA places them on a permitted bulk-substances category.
The classification above is the The Longevity Archive reading of U.S. Food and Drug Administration listings for Semax / Selank at the reviewed date, not a legal opinion. Rules change, and importing, prescribing and possessing a compound can each be treated differently. Check the regulator directly before acting on anything here.
Semax / Selank in other countries
Frequently asked questions
Is Semax / Selank legal in the United States?
No. Semax / Selank is not an approved medicine in the United States; its classification is "Not approved; research use only". Nothing containing it is authorized for any use in people. Vials labeled "for research use only" are not exempt: that label does not make human use lawful. On the evidence, 2 human studies are cited on its profile. Note: Neither peptide is FDA-approved. Semax was removed from FDA Category 2 in April 2026 and the Pharmacy Compounding Advisory Committee voted to recommend it for compounding in July 2026; that vote is advisory and no rulemaking has followed.
Can I buy Semax / Selank in the United States?
No approved product exists to buy. In the United States Semax / Selank is classified as "Not approved; research use only", so there is no licensed pharmacy product. Vendors selling it "for research use only" are not selling it for human use, and that label does not change its legal status. This site does not list or recommend vendors. Note: Neither peptide is FDA-approved. Semax was removed from FDA Category 2 in April 2026 and the Pharmacy Compounding Advisory Committee voted to recommend it for compounding in July 2026; that vote is advisory and no rulemaking has followed.
Is Semax / Selank FDA approved?
No. FDA status: Not approved as a blend or as single agents. Both are registered medicines in Russia; neither has FDA or EMA approval, and no combination product is registered anywhere.. Current US classification: "Not approved; research use only". On the evidence, 2 human studies are cited on its profile.
Related compounds in the United States
Full research profile
Mechanism, cited studies, FDA status and the full legal summary for Semax / Selank live on its compound profile.
Semax / Selank profileThis page is general information about the regulatory status of Semax / Selank in the United States, current as of Sep 2026. It is not legal advice, and classifications change; check U.S. Food and Drug Administration directly or consult a lawyer for a specific situation. Educational use only. This database summarizes published research. It is not medical advice and contains no dosing protocols or recommendations for personal use. The Longevity Archive has no vendor relationships and does not recommend where to buy anything.