Semax: Half-Life, Tracking & Reference
Frequently logged as a nasal or cognitive-support routine.
| Category | Cognitive Support |
|---|---|
| Typical half-life | about 30 minutes |
| Essentially cleared in | roughly 2 hours (~5 half-lives) |
| Common routes | Nasal spray |
Half-life, explained with Semax's numbers
A half-life of about 30 minutes means that after that much time, about half of an absorbed amount remains. Each additional half-life halves it again:
| Elapsed time | Estimated amount remaining |
|---|---|
| 1 half-life (30 minutes) | 50% remaining |
| 2 half-lives (1 hour) | 25% remaining |
| 3 half-lives (1.5 hours) | 12.5% remaining |
| 4 half-lives (2 hours) | 6.25% remaining |
| 5 half-lives (2.5 hours) | 3.125% remaining |
This is why spacing and consistency matter more than any single dose time, and why short-half-life compounds are often scheduled more frequently than long ones. You can see this curve for your own logged schedule in the levels visualizer or automatically in the app.
What it’s tracked for
- Focus routine tracking
- Mood note pairing
Reported side effects
- Nasal irritation
- Headache
Safety notes
Route-specific instructions should be reviewed with a provider.
- Review neurologic history
Often tracked alongside
- Useful with work-session notes
Research context
- Nootropic peptide literature
Frequently asked questions
- What is the half-life of Semax?
- The commonly referenced elimination half-life of Semax is about 30 minutes. Half-life is the time it takes for the amount of a compound in the body to fall by half; it is the basis for estimating how levels rise and fall between doses.
- How long does Semax stay in your system?
- As a rule of thumb, a compound is considered essentially cleared after about five half-lives. For Semax, with a half-life of about 30 minutes, that works out to roughly 2 hours. Individual factors like metabolism, dose, and route of administration all shift this, so treat it as an estimate, not a measurement.
- How is Semax administered?
- Semax is most commonly tracked with these routes: Nasal spray. Route affects how quickly a compound is absorbed and how long it acts; your provider determines what is appropriate for you.
- What do people track Semax for?
- Frequently logged as a nasal or cognitive-support routine. PeptideWiz is a tracking tool: it records what you and your provider have decided, and does not recommend any compound or dose.
Not medical advice. This page is an educational reference
for people who track provider-directed protocols. It does not recommend Semax or any
dose, and half-life figures are commonly cited estimates that vary between individuals and
formulations. Always work with a licensed medical provider.