Peptide Injection Alternatives: How 5 Needle-Free Routes Compare Oral, nasal, transdermal, oral dissolving and buccal delivery
NeoPep Innovations
Why look beyond injections? Repeated injections can mean needles, injection-site soreness and regular administration. That is why interest in alternatives to peptide injections is growing, with researchers looking at five needle-free routes. The challenge is that peptides are hard to deliver. Many weigh between 500 and 5,000 Daltons, and their size, stability and enzyme sensitivity all limit how much reaches the bloodstream.
The five routes at a glance Route
How it works
Main strength
Main challenge
Oral
Peptide is swallowed
Familiar and convenient
GI degradation, first-pass metabolism
Nasal
Through nasal tissue
Avoids the GI tract
Mucus, variable absorption
Transdermal
Through the skin
Patch-based delivery
Strong skin barrier
Oral dissolving
Film dissolves in the mouth
Simple, thin format
Peptide may be swallowed
Through cheek tissue
Direct mucosal delivery, reduced GI exposure
Peptide must cross buccal tissue
Buccal
Four routes, four barriers Oral
Nasal
Acids and enzymes in the GI tract break peptides down, and liver first-pass metabolism can cut exposure further.
Mucus carries material away from the absorption area, and the amount per dose is limited.
Transdermal
Oral dissolving
The skin’s outer layer blocks large, water-loving peptides, so patches need added technology.
The peptide can be swallowed with saliva and meet the same GI conditions as oral delivery.
Why buccal delivery stands out 1
Reduced GI exposure
2
Reduced first-pass exposure
3
Direct mucosal contact
4
Controlled-release potential
Peptide skips the stomach and intestines
Can lessen the hepatic first-pass effect
Patch sits against the cheek, not loose in the mouth
Matrix can regulate movement toward the tissue
Peptide size, stability, permeability and formulation also affect how much is absorbed.
Buccal patch placed against the cheek
Where NeoPep fits TD-IntelGel™ Tri-layer hydrogel patch for peptide stability and controlled trans-diffusion
Muco-SmartSeal® Keeps the patch in contact with the cheek and limits peptide loss into saliva
Layers of the NeoPep buccal patch
What the 81% result shows
81%
32%
2%
1%
NeoPep TD-IntelGel patch
Oral dissolving strips
Capsules
Tablets
In NeoPep Innovations internal in-vitro testing (PermeaPad), the TD-IntelGel buccal patch reached 81% efficacy, compared with 32% for oral dissolving strips, 2% for capsules and 1% for tablets.
This is an in-vitro result, not a clinical bioavailability figure.
Thank You Building a peptide product? Talk to our team about the TD-IntelGel buccal delivery platform.
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