Understand the source comparison
How to Inject Melatonin SubQ: Method Comparison
Oral tablet (immediate-release) 10–56% (high first-pass metabolism) 30–60 minutes 4–6 hours Convenient, inexpensive, no sterility concerns Preferred for most users. Adequate bioavailability for therapeutic effect Sublingual tablet 30–70% (bypasses some first-p
No winner is assigned.
This page preserves a source comparison for education. It does not add a rating, recommendation or clinical judgment.
- Oral tablet (immediate-release)
- 10–56% (high first-pass metabolism)
- 30–60 minutes
- 4–6 hours
- Convenient, inexpensive, no sterility concerns
- Preferred for most users. Adequate bioavailability for therapeutic effect
- Sublingual tablet
- 30–70% (bypasses some first-pass)
- 15–30 minutes
- 3–5 hours
- Faster onset, requires holding under tongue 2–3 minutes
- Useful for faster sleep latency. Minimal advantage over oral for total sleep time
- Subcutaneous injection
- 80–90% (bypasses hepatic metabolism)
- 20–45 minutes
- Requires reconstitution, sterile technique, refrigeration
- Higher bioavailability doesn't improve outcomes. Adds complexity without benefit
- Transdermal patch
- 40–60% (variable absorption)
- 60–120 minutes
- 8–12 hours (sustained release)
- Extended release kinetics, potential skin irritation
- Useful for sleep maintenance issues. Not sleep onset