Head to head
Semax against Noopept
Two compounds registered as medicines in Russia and sold as nootropics everywhere else, one a heptapeptide given intranasally and one an orally active dipeptide. Both have Russian language clinical literatures that have not been replicated elsewhere.
Column A
SemaxSemax (synthetic ACTH 4-10 analogue)
A synthetic heptapeptide approved in Russia for stroke and cognitive disorders, studied for BDNF-driven neuroprotection.
Column B
NoopeptNoopept (Omberacetam)
A proline-containing dipeptide nootropic approved in Russia, studied for mild cognitive impairment and neuroprotection.
Side by side, on the facts we can check
| Attribute | Semax | Noopept |
|---|---|---|
| Category | Nootropic & CNS | Nootropic & CNS |
| FDA status | Not FDA-approved (approved in Russia and Ukraine). PCAC voted to recommend for compounding (July 2026); awaiting FDA rulemaking | Not FDA-approved (approved in Russia) |
| Half-life | Short (minutes); intranasal use | Short |
| Molecular weight | 813.9 Da | 318.4 Da |
| Mechanism | Increases BDNF and NGF expression and modulates the melanocortin and dopaminergic systems, supporting neuroprotection and synaptic plasticity. | Increases BDNF and NGF expression and modulates glutamate signaling, supporting memory and neuroprotection. |
| Human studies cited | 1 | 1 |
| Legal status, US | Not approved; research use only | Not approved; sold as a research chemical / supplement in some channels |
Frequently asked questions
What is the difference between Semax and Noopept?
Semax: A synthetic heptapeptide approved in Russia for stroke and cognitive disorders, studied for BDNF-driven neuroprotection. Noopept: A proline-containing dipeptide nootropic approved in Russia, studied for mild cognitive impairment and neuroprotection.
Which has stronger research evidence, Semax or Noopept?
This database does not grade compounds. It counts what was run in people: 1 of the 4 studies cited on the Semax profile were human work, against 1 of 3 for Noopept. Those counts are of our own citation lists and understate any larger literature, and neither is a recommendation.
Are Semax and Noopept FDA-approved?
Semax: Not FDA-approved (approved in Russia and Ukraine). PCAC voted to recommend for compounding (July 2026); awaiting FDA rulemaking. Noopept: Not FDA-approved (approved in Russia).
Related posts
Blog articles that cover Semax or Noopept, newest first.
- Research / Sep 8, 2026 / 9 minPeptides for Sleep: DSIP, Epitalon and Pinealon Against the Evidence
- Safety / Sep 8, 2026 / 9 minPeptide Side Effects by Class: What Is Documented, What Is Anecdotal
- Regulation / Sep 8, 2026 / 9 minFDA Peptide Status in 2026: The Category 2 Removals, the July Votes, and What Actually Changed
Reviewed Sep 2026. This page sets two published records side by side. It is educational, it is not medical advice, and it contains no dosing protocols or recommendations for personal use.