Semax vs Oxytocin
Side-by-side comparison of key properties, dosing, and research.
- Summary
- Semax is a synthetic heptapeptide derived from ACTH developed in Russia. It is a potent nootropic that enhances memory, focus, and provides neuroprotection. Approved in Russia for cognitive disorders, stroke recovery, and traumatic brain injury.
- Oxytocin is a 9-amino acid neuropeptide produced in the hypothalamus with diverse roles in social bonding, trust, stress reduction, and sexual function. Exogenous administration is used therapeutically to improve social cognition, reduce anxiety, and enhance intimacy.
- Half-Life
- Minutes (but effects persist for hours via BDNF induction)
- ~3–5 minutes (IV); ~30–60 minutes (intranasal, CNS effects persist longer)
- Admin Route
- Intranasal, SubQ
- Intranasal, SubQ, IV
- Research
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- Typical Dose
- 0.25–1 mg (250–1000 mcg)
- 20–40 IU
- Frequency
- 1–2 times daily
- As needed (not daily long-term)
- Key Benefits
- Enhances memory and learning
- Improves focus and concentration
- Increases mental energy and motivation
- Provides neuroprotection via BDNF and NGF upregulation
- Reduces cognitive decline
- May alleviate ADHD symptoms
- Supports recovery from brain injury and stroke
- Fast-acting — effects within 30–60 minutes
- Approved in Russia for cognitive disorders and stroke recovery
- Enhances social bonding and trust
- Reduces social anxiety and fear of rejection
- Improves autism spectrum symptoms (social cognition)
- Reduces cortisol and stress reactivity
- Enhances sexual arousal and intimacy
- Promotes maternal behavior and bonding
- May improve depressive symptoms
- Appetite suppression and metabolic effects
- Side Effects
- Headache (rare, often from higher doses)
- Anxiety or overstimulation at high doses
- Sleep disruption if dosed too late
- Irritability (uncommon)
- Mild uterine cramping (avoid in pregnancy)
- Nasal irritation (intranasal)
- Headache
- Potential emotional over-attachment or jealousy amplification
- +2 more
- Stacks With
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