Oxytocin vs Semax
Side-by-side comparison of Oxytocin and Semax: mechanism, half-life, dose range, safety profile, and vendor pricing.
Price snapshot
Oxytocin
Semax
Oxytocin
Oxytocin is a nine-amino-acid cyclic peptide hormone (Cys-Tyr-Ile-Gln-Asn-Cys-Pro-Leu-Gly-NH2) synthesized in magnocellular neurons of the hypothalamic paraventricular (PVN) and supraoptic nuclei (SON), then transported…
Lowest listed price: $34.99 across 4 listings
Full Oxytocin profileSemax
Semax is a synthetic heptapeptide (Met-Glu-His-Phe-Pro-Gly-Pro, MEHFPGP, 813 Da molecular weight) developed at the Institute of Molecular Genetics of the Russian Academy of Sciences in the 1980s. The compound is derived…
Lowest listed price: $32.90 across 5 listings
Full Semax profileSide-by-side comparison
| Attribute | Oxytocin | Semax |
|---|---|---|
| Category | Hormones & Endocrine (Non-GH) | Nootropics |
| Research Stage | FDA-Approved | Approved in Russia; registered as a prescription intranasal solution |
| Mechanism of Action | Oxytocin signals primarily through the oxytocin receptor (OXTR), a single G-protein-coupled receptor (GPCR) encoded on chromosome 3p25.3 in humans. OXTR couples predominantly to Gαq/11 signaling, activating phospholipase C, generating IP3 and DAG, raising… | Primary Mechanism: Multi-Pathway Neurotrophic Activation Semax produces its effects through coordinated activation of multiple neurotrophic, neurotransmitter, and neuroprotective pathways. Unlike conventional nootropics that target a single system (modafinil… |
| Half-Life | ~1-6 minutes (plasma); central/behavioral effects outlast plasma clearance, typically ~30-120 minutes after intranasal dosing | ~2-3 minutes plasma half-life (functional neurological effects persist 12-24 hours due to BDNF/NGF gene expression changes) |
| Typical Dose Range | — | 100-900 mcg intranasal daily (0.1% solution: 2-3 drops per nostril 2-3x daily); 1% solution used for acute stroke in Russian clinical protocols |
| Dosing Frequency | As needed (on-demand), timed 20-45 minutes before a target social/intimate window; research protocols have used up to 2-3x daily (commonly 24 IU twice daily) intranasally | Intranasal 1–3 times daily |
| Administration | — | Intranasal |
| Side Effects | Oxytocin has a favorable safety profile at typical behavioral-research doses (intranasal 24-48 IU, subcutaneous 2-10 IU). Most side effects are mild and transient. Common (any oxytocin use): - Mild flushing or warm sensation - transient, reflecting modest… | Overall Safety Profile Semax has an excellent safety profile across 20+ years of Russian clinical use. In acute stroke trials, cognitive studies, and pediatric applications, Semax has demonstrated consistent tolerability with minimal adverse event burden. This… |
| Molecular Weight | 1007.19 g/mol | 813.9 Da |
| Common Vial Sizes | — | 5mg, 10mg |
Price History
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Price History
5 data points- OF
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Oxytocin: potential benefits
- Social and emotional bonding (subtle, context-dependent)
- Situational social-anxiety relief
- Enhanced intimacy and post-orgasm bonding
- Labor induction and milk let-down (approved obstetric use)
- Trauma-focused therapy adjunct (investigational)
Semax: potential benefits
- Rapid BDNF/TrkB upregulation in the hippocampus, supporting synaptic plasticity and learning (PMID: 16996037)
- Neuroprotective, immunomodulatory gene-expression changes in focal cerebral ischemia (middle cerebral artery occlusion) models (PMID: 28255762)
- Cognitive enhancement including improved attention, working memory, and processing speed
- Dopaminergic modulation that may support motivation and executive function (preclinical data)
- Stroke recovery facilitation - accelerated functional recovery and improved Barthel Index in ischemic stroke patients; approved in Russia for ischemic stroke (PMID: 29798983)
- Anxiolytic and anti-asthenic effects reported in Russian clinical use, attributed to neurotrophic and monoaminergic modulation
- Non-addictive cognitive support without tolerance development or withdrawal at standard doses
Frequently asked
What's the difference between Oxytocin and Semax?
Oxytocin is a hormones & endocrine (non-gh) that oxytocin signals primarily through the oxytocin receptor (oxtr), a single g-protein-coupled receptor (gpcr) encoded on chromosome 3p25.3 in humans. oxtr couples predominantly to…. Semax is a nootropics that primary mechanism: multi-pathway neurotrophic activation semax produces its effects through coordinated activation of multiple neurotrophic, neurotransmitter, and neuroprotective…. The two differ in mechanism, half-life (~1-6 minutes (plasma); central/behavioral effects outlast plasma clearance, typically ~30-120 minutes after intranasal dosing vs ~2-3 minutes plasma half-life (functional neurological effects persist 12-24 hours due to BDNF/NGF gene expression changes)), and typical dose range.
Which has the longer half-life, Oxytocin or Semax?
Oxytocin has a half-life of ~1-6 minutes (plasma); central/behavioral effects outlast plasma clearance, typically ~30-120 minutes after intranasal dosing. Semax has a half-life of ~2-3 minutes plasma half-life (functional neurological effects persist 12-24 hours due to BDNF/NGF gene expression changes). Longer half-lives generally mean less frequent dosing but slower on/off kinetics.
Which is cheaper, Oxytocin or Semax?
Lowest listed price on BodyHackGuide: Oxytocin from $34.99, Semax from $32.90. Prices are pulled from the vendor listings tracked on BHG and change frequently. See the compare tables on each compound page for the current set of offers.
Can you stack Oxytocin and Semax?
Stacking depends on mechanism overlap, safety profile, and goals. Oxytocin and Semax should only be stacked after reviewing each compound's individual protocol page, side effect profile, and any published interaction data. Use the BodyHackGuide stack builder for a structured review before combining research compounds.
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Related comparisons
Research use only. BodyHackGuide is a research and price-comparison reference. The compounds discussed on this page are not approved by the FDA for human consumption and are sold strictly for laboratory research. Prices shown are pulled from vendor listings tracked on BHG and are subject to change. Every vendor is ranked on the same public, reproducible methodology. See editorial standards and affiliate disclosure.