Understand the source comparison
Semax Amidate Intranasal Research: Delivery Method Comparison
Intranasal (olfactory/trigeminal) 60–70% 30–45 minutes Requires proper spray technique; nasal congestion reduces absorption Gold standard for semax research. Bypasses BBB, achieves highest CNS concentrations with minimal systemic exposure Subcutaneous injectio
No winner is assigned.
This page preserves a source comparison for education. It does not add a rating, recommendation or clinical judgment.
- Intranasal (olfactory/trigeminal)
- 60–70%
- 30–45 minutes
- Requires proper spray technique; nasal congestion reduces absorption
- Gold standard for semax research. Bypasses BBB, achieves highest CNS concentrations with minimal systemic exposure
- Subcutaneous injection
- <5%
- 90–120 minutes
- Requires blood-brain barrier penetration; 95% metabolized before reaching CNS
- Ineffective for cognitive research. Achieves systemic levels but negligible brain tissue concentration
- Oral administration
- <1%
- Not applicable
- Complete first-pass hepatic metabolism; peptide bonds cleaved in GI tract before absorption
- Not viable. Semax is enzymatically degraded in the stomach and does not survive GI transit intact
- Intravenous infusion
- <3% (CNS)
- 60–90 minutes (blood); negligible CNS penetration
- Blood-brain barrier excludes hydrophilic peptides; efflux transporters pump semax back into circulation
- High serum levels but low brain penetration. Unsuitable for neurotropic research applications