Semax dose guide

A peptide dosage chart, one peptide at a time: its dose range, how often it’s taken, a typical run and the units on your syringe. All 69 peptides in the PepVault library.

A community reference, not medical advice. Each range is what has been studied or is commonly run, never a dose for you.

Semax dosage

A nasal spray nootropic derived from ACTH but modified to remove hormonal effects. In rats it raises BDNF and nerve growth factor; human data are small, mostly open-label Russian studies, chiefly in stroke. Commonly reported: a quick lift in focus, alertness and mental energy within minutes to an hour, nasal stinging, and irritability or poor sleep at high doses or late in the day. Approved in Russia for stroke recovery and memory problems after brain injury. Often paired with Selank — Semax for drive, Selank for calm.

Dose range
200–900 mcg (research range). Studied in research — not a recommendation.
How often
Daily
A typical run
10–30 days. 2–4 week cycles. Some use daily long-term without noted issues. Cycling still advised.
How it’s taken
Nasal spray: Nasal spray
Evidence
Moderate: Animal studies + some human data
Half-life
Very short (~minutes); CNS effects persist longer

Semax on your syringe

Used as a nasal spray, so it’s dosed by sprays, not drawn into a syringe.

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A community reference, not medical advice. Each range is what has been studied or is commonly run, never a dose for you.