Nootropic & Neuroprotective Peptide

Semax

Met-Glu-His-Phe-Pro-Gly-Pro • ACTH(4–7)-PGP

Semax is a synthetic seven-amino-acid peptide developed from an ACTH fragment and studied for focus, memory, learning, mood, stress resilience, and neuroprotection. Research suggests effects on BDNF, TrkB signaling, dopamine and serotonin systems, inflammatory pathways, and gene expression.

Focus Memory Neuroprotection BDNF Support

Protocol Snapshot

Quick reference before the deep dive

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Intranasal Dose

200–600mcg

Daily total, commonly divided once or twice.

Cycle Length

10–14 Days

Community protocols commonly include a 2- to 4-week break.

Primary Route

Intranasal

Published human use is concentrated on the nasal route.

Timing

Earlier Day

Late dosing may interfere with sleep.

Peptide Grade

GradeB

Regional human studies and broader preclinical BDNF and neuroprotection research support a credible cognitive rationale, while limited replication and sparse long-term safety data remain the main constraints.

Research Community Safety

Foundation

Research context, mechanisms, and practical use cases

What Is Semax?

Semax is a synthetic heptapeptide made from the ACTH(4–7) fragment combined with the stabilizing Pro-Gly-Pro sequence. Its amino-acid sequence is Met-Glu-His-Phe-Pro-Gly-Pro.

It was developed at the Institute of Molecular Genetics in Russia as an intranasal neuroactive peptide and has been studied most extensively in regional neurology and neuroprotection research.

Semax was designed without the corticosteroid activity of full-length ACTH. Its proposed effects instead center on BDNF and TrkB signaling, monoamine modulation, neuroinflammation, antioxidant defense, vascular responses, and neuroplasticity.

Semax Benefits

Semax has both human and preclinical research, although nearly all published human work comes from Russia and has not been broadly replicated in large Western clinical trials.

Focus & Attention

Small human studies and community reports describe improved concentration, mental clarity, verbal fluency, and performance during demanding cognitive tasks.

Memory & Learning

Memory and learning effects are supported mainly by preclinical work involving BDNF-related signaling and synaptic plasticity.

Neuroprotection

Clinical use in Russia centers on stroke and brain-injury recovery, while preclinical work suggests antioxidant, anti-inflammatory, and neurorepair effects.

BDNF & TrkB Signaling

Animal studies found increases in hippocampal BDNF expression and TrkB activation after intranasal Semax.

Mood & Motivation

Preclinical monoamine findings offer a possible rationale for the motivation and mood changes described by some users.

Stress Resilience

Preclinical data suggests Semax may normalize stress responses and reduce inflammatory signaling during chronic stress.

Protocol Planning

Dosing, cycling, and preparation

Semax Dosing Protocol

Daily cognitive-support protocols are based on clinical practice patterns and community use rather than formal dose-finding trials. Higher doses have been used in Russian stroke studies under medical supervision.

Intranasal Protocol

Dose

200–600mcg daily

Frequency

Once or twice daily

Timing

Morning or early afternoon

Cycle

10–14 days

Break

2–4 weeks off

Subcutaneous Protocol

Dose

200–600mcg once daily

Timing

Morning preferred

Cycle

10–14 days

Break

2–4 weeks off

Start Low

Use the lowest effective dose first

Community Use by Goal

Cognitive support: 200–400mcg daily
Neuroprotection-focused use: 400–600mcg daily
Clinical stroke research: substantially higher supervised intranasal regimens are not directly comparable to community cognitive protocols.

Semax Reconstitution

The following examples use a 10mg vial.

10mg Vial

Vial Size

10mg

BAC Water

2mL

Concentration

5mg/mL

200mcg

4 units on a U-100 syringe

600mcg

12 units on a U-100 syringe

Storage

Refrigerate after reconstitution

Reconstitution Calculator

Intranasal Preparation

Diluent

Sterile, preservative-free 0.9% sodium chloride

Final Mixture

10mg brought to 5mL total volume

Device

Metered bottle verified to deliver 0.1mL per spray

Per Spray

200mcg

Bottle Yield

Approximately 50 sprays

Storage

Refrigerate and follow supplier or pharmacy beyond-use guidance

DIY Nasal Prep Essentials

Useful supplies for intranasal Semax prep

0.9% Sterile Saline AmpoulesPreservative-free single-use saline for nasal-prep workflows. Metered Nasal Spray BottlesUse bottles with known spray output when calculating mcg per spray. 3mL Transfer SyringesUseful for moving measured saline volumes during preparation. 70% Isopropyl AlcoholFor prep-area cleanup and clean handling around materials.

Anecdotal Data Points

Community-reported outcomes and recurring patterns

Self-reported anecdotal experiences aggregated from public & private peptide community discussions and anonymous peptideprotocols.app user reports. This information does not carry the same weight as published research.

Positive Reports

Improved focus, verbal fluency, mental clarity, and easier task initiation are among the most common reports.
Some users describe a “clean” cognitive boost without the jitteriness or crash associated with stimulants.
Enhanced creativity, visualization, and problem solving are reported by some users.
Intranasal use is usually preferred for convenience and rapid onset.

Negative Reports

Some users report increased anxiety, irritability, or overstimulation at higher doses.
Nasal dryness, headache, restlessness, and sleep disruption are commonly mentioned.
A meaningful number of users report little or no noticeable effect.
Caffeine and other stimulants can feel stronger, which may worsen restlessness or anxiety.
Some users describe little change during the first few days and only notice a clearer effect around days five to seven.

Stacking & Synergy

Potential Semax pairings and tracking context

Relevant Combinations

Semax + Selank

The most common pairing. Semax is used for cognitive drive while Selank is used for a calmer baseline and anxiety support.

Semax + Caffeine

Semax may potentiate the perceived effects of caffeine. Use caution if prone to anxiety, restlessness, or overstimulation.

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Track in Journal

Track Semax with the markers that matter most for this compound.

Focus, task initiation, and mental clarity.
Recall, verbal fluency, and learning.
Mood, anxiety, sleep, and nasal irritation.

Start Tracking

Common Questions

Practical Semax answers

How is Semax different from Selank?

Semax is usually chosen for focus and cognitive drive; Selank is more often positioned around a calmer anxiolytic profile.

How much is one nasal spray?

With a 10mg vial brought to 5mL total volume in a verified 0.1mL sprayer, one spray contains 200mcg.

Is subcutaneous dosing clinically established?

No. Published human use is primarily intranasal, while injectable protocols are community- and practitioner-derived.

Can Semax feel stimulating?

Some users report restlessness, anxiety, or sleep disruption, especially with higher doses, caffeine, or late-day use.

Safety Notes

Side effects, contraindications, and precautions

Semax Side Effects

Semax has generally been described as well tolerated in Russian clinical use, but modern long-term safety and interaction data remain limited.

Most human safety data comes from Russian studies. Large Western trials, long-term pharmacovigilance, reproductive-safety studies, and comprehensive interaction testing are lacking.

In Published Research

Russian studies generally reported good tolerability without dependence, withdrawal, or clear hormonal disruption.
Long-term controlled safety data remains limited by modern Western regulatory standards.
Effects in pregnancy, breastfeeding, children, and severe psychiatric illness are not established.

What Users Report

Common: nasal irritation, dryness, mild headache, or temporary restlessness.
Less common: irritability, increased anxiety, insomnia, temporary mood changes, or blood-pressure elevation.
Temporary hair shedding is sometimes reported, but this has not been established in clinical literature.

Semax Precautions

Major Precautions

Pregnancy and breastfeeding have not been adequately studied.
Semax is not a substitute for urgent care during mania, psychosis, severe agitation, or another acute psychiatric crisis.
Known hypersensitivity to Semax or formulation ingredients.

Use Caution With

Existing anxiety or panic symptoms, especially at higher doses.
Uncontrolled hypertension or a history of marked blood-pressure responses to stimulating compounds.
MAO inhibitors; formal human interaction data with Semax is unavailable.
Stimulants, caffeine, or other nootropics because their effects may be amplified.
Other nasal vasoconstrictors when using the intranasal route.

Drug Interactions

No comprehensive human interaction studies have established a definitive interaction profile. MAO inhibitors, stimulants, caffeine, and dopaminergic nootropics warrant caution because combined neurochemical and stimulating effects are uncertain.

Monitoring

Track focus, mood, anxiety, sleep, blood pressure when relevant, headache frequency, nasal irritation, and any signs of overstimulation. Stop use and seek medical guidance for severe anxiety, agitation, marked blood-pressure changes, or neurological symptoms.

Regulatory Status

Semax has a prescription-use history in Russia but is not FDA approved in the United States. Most human literature is regional, and U.S. prescribing guidance has not been established.

FINAL VERDICT

Peptide Protocol's Opinionated Opinion

This is not medical advice. This editorial is our own opinion piece based off the experience of our own lab rats.

In our experience Semax wasn't very strong, but you can tell there is a benefit in focus, learning capacity, and neuroprotection. It acts fast with decent cognitive benefits that many users describe as “sharper thinking” and better mental endurance. A staple for mental performance optimization with strong anecdotal support.

We like Adamax better as it’s the bigger, better brother. That said, Semax still has its place. Stacks very well with Selank. Semax handles the cognitive side through BDNF and dopamine, while Selank is the anxiolytic counterpart, taking the edge off any overstimulation Semax can cause for some people. Run them together on the same 10 to 14 day cycle, both intranasal, mornings and early afternoon. We see others including ourselves get better results stacking them than running either alone. We have not seen major downsides reported, which makes it an easy daily addition for mental clarity and stress management when Adamax is not available or when a milder option is preferred.