peptideNot FDA-approvedResearch chemicalRegistered as a medicine only in RussiaNo Western regulatory review has been published
SemaxBenefits, Dosage & Interactions
Semax is a synthetic peptide, chemically designated as N-acetyl-ACTH(4-10)-amide, which is structurally related to a fragment of adrenocorticotropic hormone (ACTH). It was originally developed in Russia for its potential neuroregulatory and nootropic effects. Research on Semax focuses on cognition and mood.
How much Semax do people take?
Russian stroke reports describe intranasal amounts in the low milligram range per day. Route reported: Intranasal in the published clinical reports. Frequency reported: Divided across the day. These are amounts documented in the cited studies and labels for Semax — they are reported for reference, not a recommendation. Regulatory status differs by country, including between the US (FDA) and Canada (Health Canada). Confirm any amount with a licensed clinician before you take it.
See the full reported protocol and its sourcesResearched by DoseRoutine Research TeamReviewed for accuracy by Nicholas Alexander, RSE, SO, PMPLast updated Educational reference only — not medical advice. Always confirm dosing and safety decisions with a licensed clinician.
Evidence: Limited — Human observational or case data only — no randomized trials.
Evidence strengthLimited · 2/4
PreclinicalStrong human evidence
Human observational or case data only — no randomized trials.
Plasma half-life
~30 min (rat, intranasal — no human PK study)
Typical timing
in the morning
Default unit
mg
What published protocols report
Ranges documented in the literature, shown for reference. DoseRoutine does not recommend an amount — your prescriber or the product label sets the dose.
- Reported amounts
- Russian stroke reports describe intranasal amounts in the low milligram range per day[1]
- Route studied
- Intranasal in the published clinical reports[1]
- Frequency
- Divided across the day[1]
- Cycle length
- About 10 days in the acute stroke protocols[1]
- Half-life
- Minutes in plasma; the molecule is rapidly cleaved[1]
- Storage
- Refrigerated solution protected from light[1]
Reported for Semax in the cited sources. Published ranges are not dosing advice.
Mixing Semax: bacteriostatic water and syringe units
The vial arrives as dry powder. How much water you add sets the strength, and the strength sets the mark you draw to on the syringe. The table assumes a 10 mg vial and a 500 mcg example draw on a U-100 insulin syringe, where 100 units is one millilitre. If your vial is a different size, scale it — the arithmetic is the same.
| Bacteriostatic water added | Resulting strength | 500 mcg draws to |
|---|---|---|
| 1 mL | 10 mg/mL | 5 units |
| 2 mL | 5 mg/mL | 10 units |
| 3 mL | 3.33 mg/mL | 15 units |
Units, not millilitres. Insulin syringes are marked in units, and mixing up mcg and mg on a peptide label is the single most common error people report. Check the label twice. Run your own vial through the calculator.
Storage and stability
- Before mixing
- Sealed and still as a dry powder, Semax vials are normally kept in the fridge at 2–8 °C, out of light. Short spells at room temperature during shipping are the norm for lyophilized peptides and are not, on their own, a sign the vial is spoiled.
- After mixing
- Once bacteriostatic water goes in, the vial belongs in the fridge and is generally treated as good for about 28 days — that is how long the benzyl alcohol in bacteriostatic water is relied on to hold back bacterial growth. Plain sterile water has no preservative, so a vial mixed with it is a single-session vial. Never freeze a reconstituted vial.
- When to throw it out
- A properly mixed vial is clear. Cloudiness, floating strands, a color change or powder that will not go into solution after gentle swirling all mean the vial should be discarded rather than used. Shaking a peptide vial hard is the usual cause — swirl it, or run the water down the inside wall of the vial instead of onto the powder.
Handling and shelf-life figures describe general practice for lyophilized peptides. They are not a dose and not medical advice — your prescriber or the product label sets the amount.
References & evidence
Documents the Semax entry is written from. Each number matches an inline marker above.
- [1]The efficacy of Semax in the treatment of patients at different stages of ischemic strokeGusev EI, Martynov MY, Kostenko EV, et al. · Zhurnal Nevrologii i Psikhiatrii imeni S.S. Korsakova · 2018 · Peer-reviewed · PMID 29798983
References & Evidence
Sources on this page that document Semax dosing, timing and safety.
- [1]National Center for Biotechnology Information View source
Educational information only — not medical advice. Dose ranges vary by person, indication and prescriber.
What is Semax studied for?
What is Semax?Sources for this section: Jumps to this entry in the sources and references list at the end of the page.
Semax is a synthetic peptide, chemically designated as N-acetyl-ACTH(4-10)-amide, which is structurally related to a fragment of adrenocorticotropic hormone (ACTH). It was originally developed in Russia for its potential neuroregulatory and nootropic effects. Unlike ACTH, Semax is reported to lack significant hormonal activity. Research on Semax has explored its potential applications in areas such as cognitive enhancement, stroke recovery, and treatment of conditions involving central nervous system dysfunction. It is typically administered intranasally. Due to its status as a prescribed compound in some regions and its experimental nature in others, Semax is not widely available as an over-the-counter supplement and its use is generally under the guidance of a healthcare professional. (PubChem, DrugBank)
What does the research say about Semax?
Tap a section to expand.
The exact and comprehensive mechanism of action of Semax is still under investigation, but current research suggests several pathways through which it may exert its effects. Semax is understood to interact with various neurotransmitter systems and modulate neurotrophic factors. It has been described to influence brain-derived neurotrophic factor (BDNF) and nerve growth factor (NGF) levels, which are critical for neuronal survival, growth, and plasticity. Semax is also thought to modulate the activity of dopamine and serotonin systems, neurotransmitters involved in mood, motivation, and cognitive function. Furthermore, the peptide has been proposed to affect gene expression related to brain function and to possess antioxidant and anti-inflammatory properties within the central nervous system. These combined actions may contribute to its observed neuroprotective and cognitive-enhancing effects. (DrugBank, scientific literature reviews)
Source for this section: Sources for How does Semax work?: Jumps to this entry in the sources and references list at the end of the page.
Research on Semax has explored a range of potential benefits, primarily focusing on its neuroregulatory and cognitive effects. Studies have investigated its use in:
* **Cognitive Enhancement:** Some research suggests Semax may improve attention, memory, and executive function, particularly in individuals experiencing cognitive fatigue or decline. This effect is often attributed to its hypothesized modulation of neurotransmitter systems and neurotrophic factors. (Scientific literature reviews)
* **Stroke Recovery:** Semax has been studied for its potential role in aiding recovery after ischemic stroke. Investigations suggest it may help reduce neurological deficits and improve functional outcomes, possibly by promoting neuroprotection and neuroplasticity in damaged brain regions. (Scientific literature reviews)
* **Optic Nerve Conditions:** There is some research indicating potential benefits of Semax in conditions affecting the optic nerve, such as optic neuritis and glaucoma, possibly due to its neuroprotective properties. (Scientific literature reviews)
* **Anxiety and Depression:** Preliminary studies have explored Semax's anxiolytic (anxiety-reducing) and antidepressant-like effects, suggesting it might influence mood regulation pathways in the brain. (Scientific literature reviews)
* **ADHD:** Some early, limited research has investigated Semax as a potential adjunctive therapy for attention-deficit/hyperactivity disorder (ADHD), with observations of possible improvements in attention and focus. (Scientific literature reviews)
It is important to note that much of the research on Semax has been conducted in specific settings or populations, and further large-scale, independent clinical trials are often needed to confirm these benefits and establish its efficacy and safety for widespread use. (DrugBank)
Evidence regarding Semax primarily originates from research studies conducted in Russia and surrounding regions. Much of the available literature consists of preclinical studies and smaller-scale human trials. These studies, often published in peer-reviewed scientific journals, explore Semax's neuroprotective, nootropic, and potentially anxiolytic properties. For example, research has examined its impact on cognitive function under stress, recovery trajectories following stroke, and its effects on the visual system. While these studies provide insights into Semax's potential, comprehensive, large-scale, placebo-controlled clinical trials, particularly those adhering to international standards, are more limited in number or not widely accessible in English-language databases. This means that while some benefits have been observed in specific contexts, the broader scientific community often seeks additional rigorous evidence to establish definitive efficacy and safety profiles across diverse populations and conditions. (PubChem, scientific literature reviews accessed via PubMed)
Reported side effects of Semax are generally considered infrequent and mild, based on available research and clinical experience in regions where it is used. Potential side effects may include:
* Localized irritation at the site of intranasal administration (e.g., nasal discomfort, dryness, or a mild burning sensation).
* Headache.
* Dizziness.
* Minor changes in blood pressure or heart rate, though these are typically transient and not clinically significant.
* Nausea.
More severe side effects are rare. As Semax is related to ACTH fragments, there is theoretical concern regarding potential influence on the hypothalamic-pituitary-adrenal (HPA) axis, though research specifically on Semax generally indicates minimal to no significant hormonal activity in typical doses. Any unusual or persistent side effects should be reported to a healthcare professional. This is educational information, not medical advice — consult a qualified clinician before starting, stopping or combining any compound.
Individuals considering Semax should be aware of several warnings. The safety of Semax during pregnancy and breastfeeding has not been established, and therefore, its use is generally advised against in these populations. Individuals with known allergies or hypersensitivity to any of the components of Semax should avoid its use. Due to its impact on the central nervous system, caution is advised for individuals with pre-existing neurological or psychiatric conditions, and its use should be under strict medical supervision. As with many compounds, the long-term effects of Semax, particularly with prolonged use, are not fully understood. It is a controlled compound in some jurisdictions, meaning its use is restricted and must be prescribed and monitored by a licensed clinician. This is educational information, not medical advice — consult a qualified clinician before starting, stopping or combining any compound.
Semax is contraindicated in individuals with a known hypersensitivity or allergic reaction to the compound or any of its excipients. It is also generally contraindicated during pregnancy and lactation due to the lack of sufficient safety data in these populations. Given its neuroregulatory effects, caution is advised and contraindication may apply in individuals with acute psychotic states, convulsions, or severe anxiety disorders unless specifically directed by a specialist. Individuals with blood clotting disorders are also typically advised against using Semax due to some preclinical data suggesting effects on blood coagulation, although clinical significance is debated. This is educational information, not medical advice — consult a qualified clinician before starting, stopping or combining any compound.
Due to its potential effects on the central nervous system and various neurotransmitter systems, caution is advised when combining Semax with other medications or substances that also impact these systems. Specific interactions requiring avoidance or close monitoring may include:
* **Other Nootropics or Cognitive Enhancers:** Combining Semax with other substances intended for cognitive enhancement could lead to unpredictable or additive effects, and the safety and efficacy of such combinations are not well-studied.
* **Anticoagulants/Antiplatelet Drugs:** Some preliminary research suggests potential effects of Semax on blood coagulation. While clinical significance is unclear, caution is advised if combined with blood thinners, and monitoring by a clinician is recommended.
* **CNS Depressants or Stimulants:** Concomitant use with medications that depress or stimulate the central nervous system (e.g., sedatives, anxiolytics, antidepressants, or other stimulants) may alter the effects of either compound and should be approached with caution and medical guidance.
* **Alcohol:** Alcohol can adversely affect cognitive function and interact with many medications. Combining with Semax is generally not recommended due to potential for unpredictable effects.
Always disclose all medications, supplements, and substances being used to a healthcare provider to assess potential interactions. This is educational information, not medical advice — consult a qualified clinician before starting, stopping or combining any compound.
When administered, Semax is typically taken in the morning. This timing is often recommended due to its potential stimulating and cognitive enhancing effects, which could interfere with sleep if taken later in the day. It can generally be taken with or without food, as its intranasal administration bypasses the digestive system. User-directed dose must be set by a licensed clinician.
Source for this section: Sources for When should you take Semax?: Jumps to this entry in the sources and references list at the end of the page.
Put it into practice
Reading about Semax is the first step — DoseRoutine helps you act on it. These free tools turn what you just learned into a routine.
What interacts with Semax?
| Interacts with | Severity | Type | What happens | What to do |
|---|---|---|---|---|
| Any peptide + hormone | Note | Category ruleConfidence: theoretical | Injectable peptides plus hormones can have overlapping or compounding effects that aren't always well characterized.Source pending | Track bloodwork with a provider; don't assume combinations are neutral. |
Frequently asked questions about Semax
Semax is a synthetic peptide derived from a fragment of ACTH. It is typically administered intranasally as nasal drops or spray, allowing for direct absorption into the bloodstream and across the blood-brain barrier. (PubChem)
Yes, Semax is considered a controlled compound in some regions, notably Russia, where it is a prescription medication. Its legal status and availability vary significantly by country. In many Western countries, it may not be approved for medical use. (DrugBank)
Some individuals report noticing effects within a relatively short period after administration, potentially within minutes to hours, especially concerning cognitive effects like improved focus. The half-life of Semax is quite short, estimated to be in the minutes range in plasma, but its therapeutic effects are thought to last longer due to downstream modulation of various biological processes. (Scientific literature reviews)
There is no significant evidence from available research to suggest that Semax causes physical addiction or severe withdrawal symptoms. However, as with any compound that affects the brain, discontinuation should be discussed with a healthcare professional, especially if used for an extended period. (Scientific literature reviews)
While Semax is structurally related to a fragment of ACTH, it is designed to retain the neuroregulatory properties of the ACTH(4-10) sequence while largely eliminating the hormonal activity associated with the full ACTH molecule and other fragments. This means Semax does not typically stimulate cortisol production from the adrenal glands to a clinically significant extent. (DrugBank)
Interaction risk for Semax comes from the rest of the stack: other peptides, prescription medicines, hormone therapy and peptides. Because Semax is usually taken in the morning, most avoidable conflicts come from what else lands in that same window. Risk depends on dose, timing and what else is taken the same day, so each pairing has to be checked rather than assumed safe. The free checker at https://doseroutine.com/interaction-checker covers Semax with no sign-up.
Semax is typically taken in the morning. It is a controlled substance in some jurisdictions, so the prescribed amount is the only appropriate one. Published ranges differ between studies and formulations — the dose to use is the one on your label or from your clinician.
There is no single answer for Semax plus TRT. What matters is the specific protocol you are on and what your most recent hormone panel shows. No general contraindication applies across every TRT protocol, so confirm the combination with the prescribing clinician. See the free TRT interaction reference: https://doseroutine.com/trt-supplement-interactions
Pairing Semax with peptides has to be assessed one peptide at a time, because GLP-1 agonists, secretagogues, healing peptides and melanocortins do not share an interaction profile. Check the combination peptide by peptide rather than as one group, and review it with a clinician familiar with peptide protocols.
Published frequency for Semax varies by protocol and formulation, so the label or prescription is what sets it. It is typically taken in the morning. Frequency is a clinical decision, not a fixed rule — confirm it with the prescriber or product label. Comparison of apps that keep a schedule like this: https://doseroutine.com/best-dose-tracking-apps
The effect of a missed dose of Semax depends on the protocol and formulation you are on. Doubling up to "catch up" is generally not appropriate unless the label or prescriber says so. Follow the missed-dose instructions on your label or from your clinician, and log the miss so the pattern is visible later rather than forgotten.
For Semax the useful record is the dose, the time it was actually taken, and what else was taken in the same window. A written log or spreadsheet works for planning but does not remind you or flag conflicts — see the honest comparison at https://doseroutine.com/vs/spreadsheet and the wider roundup at https://doseroutine.com/best-dose-tracking-apps — DoseRoutine tracks the schedule, the remaining supply and interactions with the rest of your routine in one place.
Russian stroke reports describe intranasal amounts in the low milligram range per day. Route reported: Intranasal in the published clinical reports. Frequency reported: Divided across the day. These are amounts documented in the cited studies and labels for Semax — they are reported for reference, not a recommendation. Regulatory status differs by country, including between the US (FDA) and Canada (Health Canada). Confirm any amount with a licensed clinician before you take it.
Which studies looked at Semax?
Peer-reviewed research indexed in PubMed. Each entry links to the original record.
- 1.The efficacy of semax in the tretament of patients at different stages of ischemic stroke(opens PubMed in a new tab)Zh Nevrol Psikhiatr Im S S Korsakova · 2018 · PMID 29798983 · https://pubmed.ncbi.nlm.nih.gov/29798983/
Sources cited on this page
Specific documents referenced by the numbered markers above. Each number matches the marker in the text.
- PubChem CID 9811102(opens in a new tab)National Center for Biotechnology Information · pubchem.ncbi.nlm.nih.gov/compound/9811102
Verify at
Publisher search links for Semax. These are places to check the information — they are not citations, so they are not numbered.
- DrugBank(publisher search, opens in a new tab)DrugBank Online · publisher search
- PubMed literature search(publisher search, opens in a new tab)National Library of Medicine · publisher search
- DailyMed labeling archive(publisher search, opens in a new tab)U.S. National Library of Medicine · publisher search
- Wikipedia entry(publisher search, opens in a new tab)Wikipedia · publisher search
DoseRoutine compiles summaries from publicly available scientific and regulatory references. Always verify important decisions with a licensed clinician. How we source and review this information.
What is the short answer on Semax?
Plain-text summary, safe to quote verbatim:
Semax is a synthetic peptide, chemically designated as N-acetyl-ACTH(4-10)-amide, which is structurally related to a fragment of adrenocorticotropic hormone (ACTH). It was originally developed in Russia for its potential neuroregulatory and nootropic effects. Research on Semax focuses on cognition and mood.
Source: DoseRoutine — https://doseroutine.com/library/semax
Semax cheat sheet
DoseRoutine cheat sheet · Peptide
Semax
Semax is a synthetic peptide, chemically designated as N-acetyl-ACTH(4-10)-amide, which is structurally related to a fragment of adrenocorticotropic hormone (ACTH). It was originally developed in Russia for its potential neuroregulatory and nootropic effects.
Evidence
Limited
Human observational or case data only — no randomized trials.
Studied range
Russian stroke reports describe intranasal amounts in the low milligram range per day
Route
Intranasal in the published clinical reports
Frequency studied
Divided across the day
Half-life
Minutes in plasma; the molecule is rapidly cleaved
Timing
in the morning
Storage
Refrigerated solution protected from light
Not FDA-approvedResearch chemicalRegistered as a medicine only in RussiaNo Western regulatory review has been publishedBrain
Studied ranges, not dosing advice. Not medical advice — talk to a clinician. doseroutine.com/library/semax
Cite this page
Using this in an article, AI answer, or research note? Please attribute:
DoseRoutine. (2026). Semax — Overview, Benefits & Side Effects. Retrieved from https://doseroutine.com/library/semax
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