Cognitive
Semax
per administration
It has been used in people, but no trial has settled how much or how often.
Licensed as a medicine in Russia.
The human evidence for Semax used the intranasal route. The draw worked out here assumes a subcutaneous injection, so the amount is not a direct read-across.
Quick start
Semax at a glance — the figures, plus how it's commonly run. Reference only, not medical advice.
- Typical dose
- 200–600 mcg per administration
- How often
- Every day
- Where
- Intranasal spray
- Timing
- Daytime dosing is typical; the peptide is short-acting so it's often split.
- What people report
- Focus and mood contexts are discussed acutely to within days.
- Time to steady level
- ~3 hours — about five half-lives
- Storage
- Dry vial kept cold and dark; a mixed vial in the fridge at 2–8 °C. Details
- Cycle length
- 2–4 weeks
- Break between
- 1–2 weeks Why
A research and community reference, not medical advice. Figures are descriptive, vary between sources, and are not a recommendation for use.
Key properties
Molecular reference data.
- Formula
- C37H51N9O10S
- Mol. weight
- 813.9 Da
- CAS
- 80714-61-0
- PubChem CID
- 9811102
Sequence (one-letter)
MEHFPGP
External references
Structure note
A diagram is a reference representation of the named chemical structure. It does not establish the composition, purity, or identity of any particular vial.
Work out your draw
These numbers are a starting point — change any of them.
Vial label
Copy this into your label printer.
Published research contexts for Semax describe 200–600 mcg per administration. Descriptive only, not a recommendation.
Degrades fast in plasma; estimates are rough.
Used intranasally where it is licensed; no Western dose-ranging trial fixes an injected schedule, so no schedule table is shown.
What it can be combined with
How Semax is commonly discussed alongside other peptides and drugs.
Educational reference on commonly-discussed combinations, not medical advice. Combining compounds can change how each behaves — read this as a prompt to research, not a clearance.
- SelankA commonly-paired nootropic combination from the same body of research; no reported interaction.Commonly combined
Modelled level — every day
1× is the peak after a single dose.
- Steady-state peak
- 1.00× single dose
- Time to steady state
- 3hours
- Administrations
- 7/ week
Read off the modelled curve, not an even-interval formula
About five half-lives
Where these numbers come from
- Russian Semax neuropeptide literatureMost Semax evidence is Russian-language clinical and preclinical work.