Is Semax legal? Only as a prescribed nasal spray. Here are your options.
The short answer
Only as a nasal spray, with a prescription. Since October 28, 2026, HHS says it will not take enforcement action against licensed 503A pharmacies and physicians that compound Semax free base for intranasal use for a patient with a prescription, if ten conditions are met. Injected Semax and Semax blends are outside it, and it is not FDA approval. Semax alone is not offered here. Peptides.build offers Semax / Selank, a blend outside the policy, from $183/mo when a licensed provider prescribes it.
Which kind of Semax is legal?
Semax is the narrowest entry in the policy. It names one chemical form, Semax free base, and one route, intranasal. Injected Semax, Semax blends and modified analogs are all outside it.
| What you get | Status | Why |
|---|---|---|
| Prescribed, single-ingredient Semax free base nasal spray from a licensed 503A pharmacy | Covered by the HHS policy | Intranasal only |
| Injected Semax | Outside the policy | Injection is not a listed route for Semax |
| Semax with Selank or other peptides | Outside the policy | The policy covers one active ingredient only |
| Modified versions sold as "N-Acetyl Semax" | Not named in the policy | Only Semax free base is listed |
| Sprays and vials sold as "research use only" | Not for human use | No prescription, no licensed pharmacy, no adverse-event reporting |
Semax / Selank is a blend outside the HHS policy. It is still prescribed when a licensed provider decides it is appropriate.
Can I get Semax here?
Not on its own. A single-ingredient Semax nasal spray is not offered here. These are the live protocols in the same part of our catalog, with their status stated plainly.
| Option | Status | From | |
|---|---|---|---|
| Semax alone, nasal | Covered | Not offered here | |
| Semax / Selank | Blend: outside policy | $183/mo | Start |
| MOTS-c | Covered | $158/mo | Start |
Semax / Selank pairs Semax with Selank in one injectable vial. It is outside the HHS policy twice over: it has two active ingredients, and it is injected rather than intranasal. MOTS-c sits in the same Cognitive category of our catalog and is covered by the policy as a single-ingredient injection; it is a different peptide, not a Semax substitute.
How does a prescription work online?
- Online intake. About five minutes: your health history and goals.
- Provider review. A licensed US provider decides whether a protocol is appropriate for you and, if so, writes a patient-specific prescription.
- Pharmacy compounding. A licensed US 503A pharmacy compounds it and mixes it for you.
- Delivered ready to use. Shipped cold-chain to your door, already reconstituted and labeled with the concentration.
The policy is interim: it lasts until FDA rulemaking decides each peptide's permanent status, and HHS can withdraw it. Read the ten conditions in our HHS peptide policy explainer, or see every peptide on the legal status page.
What does Semax / Selank cost?
| Plan | You pay | Per month | |
|---|---|---|---|
| Monthly | $225 | $225 | Start |
| 3 months | $599 | $199 | Start |
| 6 months | $1,099 | $183 | Start |
Includes the provider review, compounding by a licensed 503A pharmacy and cold-chain shipping. No membership fee. Plans and FAQ on the Semax / Selank protocol page; every price on the pricing page.
Prescribed by a provider. Made by a pharmacy. Verified.
Ready? The intake takes about five minutes. A licensed US provider decides what is appropriate.
FAQ
Is Semax legal in the US?
Prescribed Semax free base for intranasal use, compounded by a licensed 503A pharmacy, falls under the HHS enforcement-discretion policy of October 28, 2026, if its ten conditions are met. Other forms and routes are outside it. Semax is still not FDA-approved.
Is Semax nasal spray illegal?
A Semax free base nasal spray prescribed for you and compounded by a licensed 503A pharmacy is the one version the policy covers. Sprays sold online without a prescription as "research use only" are not covered and are not sold for human use.
Can Semax be injected under the policy?
No. The HHS appendix lists Semax for intranasal use only.
Can I buy Semax in the US?
Only through a patient-specific prescription from a licensed clinician, filled by a state-licensed 503A pharmacy, for the policy to apply. Semax alone is not offered at Peptides.build.
Is Semax / Selank covered?
No. It is a blend of two peptides, and Selank is not one of the six peptides in the policy. In this catalog it is also prescribed as a subcutaneous injection. Peptides.build still offers it from $183/mo when a licensed provider prescribes it after an intake.
Is Semax FDA-approved?
No. Compounded medications are not FDA-approved, and the HHS policy says it does not establish safety or effectiveness.
Is Semax safe?
Its safety has not been established by FDA. FDA's drug center recommended against listing it, citing limited human data. A licensed provider reviews your health history before deciding whether any protocol is appropriate.
Can state law still restrict Semax?
Yes. State pharmacy and medical boards can set their own rules. The federal policy does not override them.
Tired of reconstituting?
A licensed US provider reviews a short online intake. If a prescription is appropriate, a licensed US 503A pharmacy fills it and ships it cold-chain, already reconstituted and labeled with the concentration.
This page is educational and is not medical advice. Compounded medications are not FDA-approved. No results are implied or guaranteed. A licensed provider decides whether any protocol is appropriate for you, and sets any dose.