Understand the source comparison
VIP Protocol: Comparison of Administration Methods
Nasal Spray 60–70% 5–10 minutes 4× daily Refrigeration 2–8°C, 28-day use window Gold standard for CIRS. Direct olfactory absorption bypasses first-pass metabolism Subcutaneous Injection 85–95% 10–15 minutes 2× daily Higher bioavailability but impractical for c
No winner is assigned.
This page preserves a source comparison for education. It does not add a rating, recommendation or clinical judgment.
- Nasal Spray
- 60–70%
- 5–10 minutes
- 4× daily
- Refrigeration 2–8°C, 28-day use window
- Gold standard for CIRS. Direct olfactory absorption bypasses first-pass metabolism
- Subcutaneous Injection
- 85–95%
- 10–15 minutes
- 2× daily
- Higher bioavailability but impractical for chronic dosing; not used in published CIRS trials
- Oral Capsule
- <5%
- Not measurable
- Not applicable
- Room temperature stable
- Ineffective. Gastric acid destroys peptide before absorption
- Sublingual Spray
- 15–25%
- 15–20 minutes
- 4–6× daily
- Refrigeration 2–8°C, 21-day use window
- Lower absorption than nasal; saliva dilution reduces potency