Semax Dosage & Intranasal Protocol Guide (2026)

Semax is a synthetic peptide derived from ACTH (adrenocorticotropic hormone), specifically a heptapeptide analogue of the ACTH 4-7 fragment. Developed in Russia in the 1980s, it has been used clinically there for decades for cognitive enhancement, stroke recovery, and neurological support. It is one of the 12 peptides cleared for compounding in April 2026, meaning licensed US compounding pharmacies can now prepare it with a prescription.

Semax is almost exclusively administered intranasally. It crosses the blood-brain barrier through the nasal mucosa more effectively than through subcutaneous injection for centrally-acting peptides.

Standard Semax Doses

Semax is dosed in micrograms (mcg). Vials are typically 3mg or 5mg.

Most users start at 200-300 mcg per day and titrate up based on response. Higher doses (600-1,000 mcg) are used for acute neurological support but are less common in nootropic protocols.

Cycle length: Semax is typically run in cycles of 2-4 weeks on, followed by 1-2 weeks off. Tolerance develops with continuous use. Some users run shorter daily cycles (5 days on, 2 days off).

How to Reconstitute Semax for Intranasal Use

Semax comes as a lyophilized powder. You reconstitute it with bacteriostatic water (BAC water) and administer via a nasal spray pump.

Reconstitution for a 3mg vial:

Standard pump delivery: Most nasal spray pumps deliver 0.1mL per actuation. At 1mg/mL, one spray = 100 mcg. At 2mg/mL, one spray = 200 mcg.

Use the intranasal peptide calculator to calculate your exact spray count based on your vial size, BAC water volume, and target dose.

Administration: Sprays vs Drops

Nasal spray pump (preferred): More consistent dose delivery per actuation. Easier to use. The standard method for Semax.

Nasal drops: Some practitioners use a dropper bottle instead of a spray pump. Dose delivery is less consistent but some users find drops more comfortable. 0.1mL per drop approximates one spray.

Technique:

1. Tilt head slightly forward (not back -- you want the peptide to absorb in the nasal mucosa, not run into the throat)
2. Insert the tip just inside the nostril
3. Spray while inhaling gently
4. Alternate nostrils if dosing multiple sprays

What Semax Is Used For

Semax's primary mechanism involves BDNF (Brain-Derived Neurotrophic Factor) upregulation and modulation of dopamine and serotonin systems. Reported uses:

• Cognitive enhancement -- focus, working memory, mental clarity
• Anxiety reduction -- often reported alongside cognitive effects
• Neuroprotection -- used clinically in Russia for stroke recovery and ADHD
• Mood support -- some users report improved baseline mood and motivation
• Studying and performance -- popular among biohackers and students

Semax is not FDA-approved for any indication in the US. Use is investigational.

Tracking Your Semax Protocol

Semax's effects are primarily cognitive and mood-related, which makes tracking more important than with physical healing peptides. Without baseline data, it's easy to attribute normal variation in focus or mood to the peptide (or fail to notice real effects).

What to track:

• Daily dose and timing
• Subjective cognitive rating (1-10 focus, 1-10 mood)
• Sleep quality (from Apple Health)
• Resting heart rate
• Cycle start and stop dates

Ready to track your protocol?

• Smart reminders so you never miss a dose
• Progress tracking with photos and weight
• Medication level curves for every compound

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Frequently Asked Questions

This article is for informational purposes only and does not constitute medical advice. Semax is not FDA-approved for any indication. Always work with a licensed healthcare provider.