Peptides  /  Semax
For Adults · Compounded Peptide

Semax

A synthetic ACTH-fragment peptide.

A synthetic heptapeptide based on a fragment of adrenocorticotropic hormone, developed in Russia and studied in relation to cognition and neurological recovery. Prescribed online after a licensed provider reviews your online visit, compounded by U.S. 503A pharmacies, and shipped discreetly to most U.S. states.

$249

Start your online visit →

A few private questions, then a licensed provider reviews your answers.

100% Online 503A Compounded Licensed Providers Discreet Shipping
ForbiddenRx Semax vial
At a glance
Form
Injection
Cadence
Set by your provider
Class
Synthetic ACTH(4-10) analog
Guided by
Provider review
Helps with
Cognitive category
For
Adults 18+
The basics

What is Semax?

What it is
Synthetic ACTH(4-10) analog
Forms
Injection
Supplied as
Strength set by your prescriber
Dosing
Set by your prescriber
Supply
1-month
Visit
Online, reviewed by a licensed provider
Prescription
Provider-reviewed · not available OTC
Shipping
Discreet, unmarked · most U.S. states
Start your online visit →

Semax is a synthetic peptide built on the ACTH(4-10) fragment of adrenocorticotropic hormone, with a Pro-Gly-Pro extension added for stability. It does not have the hormonal activity of ACTH itself. It was developed at the Institute of Molecular Genetics in Moscow.

Semax is used as a medicine in Russia, but it is not an FDA-approved medication in the United States. Much of the published work comes from Russian research groups and a large share of it is preclinical.

This is a compounded preparation, not an FDA-approved medication, and compounded drugs are not reviewed by the FDA for safety or effectiveness. Individual results are not guaranteed. It is prescribed only where a licensed provider determines it is appropriate after reviewing your health history.

Why people ask about it

Why does Semax come up?

Semax appears in cognitive conversations because of Russian clinical use and laboratory work on neurotrophic signalling, including BDNF. That evidence is largely from one country and has not been established in large controlled trials by U.S. standards.

✔A provider decides, not a quiz

Every Semax prescription here follows a review by a licensed provider of your health history, current medications and goals. If it isn't appropriate for you, it isn't prescribed.

✔Compounded, not a research chemical

Your vial is compounded by a licensed U.S. 503A pharmacy and dispensed against a prescription written in your name — not sold as a "research only" product with no oversight.

Know the difference

Prescribed Semax vs. supplements and grey-market vials — what's the difference?

The short answer: unregulated supplements make claims nobody checks, "research only" vials sold online carry no prescription, no pharmacy and no accountability, and a prescribed Semax is compounded by a licensed 503A pharmacy against a provider's order written for you.

 Oral supplement"Research only" vialPrescribed Semax (Rx)
What it isAn unregulated oral precursorA vial sold without a prescriptionCompounded Semax dispensed on a provider's order
Licensed provider reviews youNoNoYes — before anything is dispensed
Compounded by a licensed pharmacyNoNoYes — U.S. 503A
Your name on the vialNoNoYes
Dose set by a prescriberNoNoYes
Legal to sell for human useAs a supplementNoYes — by prescription

The simplest test of any peptide seller: is your name on the vial? A "research only" label means no prescriber reviewed you, no licensed pharmacy compounded it, and nobody is accountable for what is actually inside.

How it works

How does getting Semax actually work?

Three steps: answer a short set of medical questions, a licensed provider reviews them, and if they prescribe, a 503A pharmacy compounds and ships it.

I

Answer a few questions

A short private medical questionnaire — your history, current medications and what you are hoping to address. It takes a couple of minutes.

II

Meet your provider live

A provider licensed in your state reviews your answers online — no appointment, no waiting room. They decide whether Semax is appropriate.

III

Compounded & shipped

If they prescribe, a licensed U.S. 503A pharmacy compounds your vial and ships it discreetly, with your name on the label.

Who it's for

Who is Semax for?

It's for adults who want Semax prescribed and compounded properly rather than bought from a grey market. Whether it is appropriate for you is a decision for the provider who reviews your visit.

✔Interested in the cognitive category

You have read about Semax in relation to focus and cognition and want it prescribed properly rather than bought from a grey market.

✔You want a real prescription

Reviewed by a licensed provider, compounded by a 503A pharmacy, dispensed with your name on the vial.

✔You want the dosing decided for you

The amount and schedule are set by your prescriber, not selected here or taken from a forum protocol.

✔You understand the evidence is early

Most Semax research is from a small number of groups, and much of it is preclinical.

✕When it's not the right fit

Semax research comes largely from Russian groups and much of it is preclinical. It is a compounded preparation, not an FDA-approved medication, and compounded drugs are not reviewed by the FDA for safety or effectiveness. Individual results are not guaranteed. If you are pregnant or breastfeeding, have an active cancer diagnosis, or have significant kidney or liver disease, tell your provider in your answers. New or unexplained symptoms should be evaluated by a clinician rather than self-treated.

How to get it

How do I get Semax online?

You answer a few questions, a licensed provider reviews your answers, and — if they prescribe — your medication is compounded and shipped to your door. No insurance required, no in-person appointment, no waiting room.

A few questions

Answer a short set of private medical questions. Add as many peptides as you like; one checkout, and a provider reviews each.

Online provider review

A provider licensed in your state reviews your answers online. Approval is never guaranteed.

Discreet delivery

If prescribed, your vial is compounded by a 503A pharmacy and ships in plain, unmarked packaging to most U.S. states.

Pricing is shown at checkout — no insurance needed, no hidden fees.

Using it & safety

How is it taken, and is it safe?

Semax is compounded as injection. The amount and the schedule are set by the provider who reviews your visit — we deliberately do not publish a dosing regimen here, because that is a clinical decision about you, not a product specification.

Forms & how it's taken

Injection
Compounded as injection.
Supplied as
Strength set by your prescriber.
Dose & schedule
Set by your prescriber. Follow the directions on your label.
Supply
1-month supply.
InjectionProvider-set

Safety & side effects

⚠ Evidence in humans is limited

Semax research comes largely from Russian groups and much of it is preclinical. It is a compounded preparation, not an FDA-approved medication, and compounded drugs are not reviewed by the FDA for safety or effectiveness. Individual results are not guaranteed.

Reported effects are most often related to the injection itself or to infusing too quickly. They can include:

  • Redness, swelling or soreness at the injection site
  • Headache
  • Nausea
  • Fatigue
  • Irritability or difficulty sleeping

Tell your provider about every condition and medication before starting, including pregnancy or breastfeeding. Stop and seek care for signs of an allergic reaction — rash, swelling of the face or throat, or difficulty breathing. For emergencies call 911.

Compare your options

Which cognitive peptide fits you?

A side-by-side look at the cognitive options available through ForbiddenRx. Which one is appropriate for you is decided by the provider who reviews your visit.

TreatmentWhat it isFocusFormForRx required
Semax
This page		Synthetic ACTH(4-10) analogCognitive categoryInjectionAdults 18+Yes
DihexaAngiotensin IV analog (oral)Cognitive categoryCapsulesAdults 18+Yes
DSIPNonapeptideSleep & recovery categoryInjectionAdults 18+Yes
Pinealon / PE-22-28 / SelankShort peptide combinationCognitive categoryInjectionAdults 18+Yes
Questions, answered

Semax FAQ

What is Semax?

Semax is a synthetic peptide based on a seven-amino-acid fragment of adrenocorticotropic hormone (ACTH), modified for stability. It does not act as ACTH does on the adrenal glands.

Is Semax FDA-approved?

No. It is used as a medicine in Russia, but it is not approved in the United States. It is a compounded preparation, not an FDA-approved medication, and compounded drugs are not reviewed by the FDA for safety or effectiveness. Individual results are not guaranteed.

How is it different from Selank?

Semax is an ACTH(4-10) analog studied mainly around cognition and neurological recovery; Selank is a tuftsin analog studied mainly around stress and anxiety. Your provider decides which, if either, is appropriate.

Do I have to book an appointment?

No. You complete the questionnaire online and a licensed provider reviews it — there is no scheduling step and no waiting room.

Can I order more than one peptide?

Yes. Add each one to your cart and check out once. A provider reviews every treatment in your order.

Credibility you can verify

Care held to a higher standard

Licensed Providers

U.S. board-certified clinicians

503A Pharmacies

U.S.-based compounding partners

Most U.S. States

We confirm your state during intake

Explore more

Also in peptides

Capsules · Cognitive category

Dihexa

An oral angiotensin IV-derived compound.

Learn more →
Injection · Sleep & recovery category

DSIP

Delta sleep-inducing peptide.

Learn more →
Category

The Peptide Catalog

Every peptide we can dispense, each prescribed by a licensed provider and compounded by a 503A pharmacy.

Learn more →

Start with a real prescription

If you are going to take Semax, take one a licensed provider prescribed and a 503A pharmacy compounded with your name on it. Answer a few questions and a licensed provider reviews them.

Start your online visit →

  • Discreet, unmarked packaging
  • Refills so you never miss a dose
  • Labs guiding every adjustment
  • Licensed providers in most U.S. states
Medically reviewed

Sources & references

Medically reviewed by ForbiddenRx Medical Affairs — Independent, licensed medical providers · Last reviewed August 2026. This page was written and is periodically reviewed for medical accuracy in line with clinical guidance followed by the independent, licensed medical providers in the ForbiddenRx network. It is provided for general educational purposes and is not a substitute for professional medical advice, diagnosis, or treatment. Always talk with a licensed provider about your individual health.

  1. PubMed — Semax and BDNF, published studies.
  2. PubMed — Semax as an ACTH(4-10) analog, published literature.
  3. U.S. Food & Drug Administration. 503A Pharmacy Compounding — the regulatory basis for how this preparation is dispensed.
For further reading

Clinical references

This page is educational and is not medical advice.