Side-by-Side Comparison · 2026

Pexiganan vs Tyrocidine

Pexiganan vs Tyrocidine — mechanism, half-life, dosing, and research status compared. Which is right for your protocol?

Pexiganan
Antimicrobial Peptide

Pexiganan (MSI-78) is a synthetic analog of magainin-2, optimized for enhanced broad-spectrum antimicrobial activity and reduced hemolytic toxicity. It was developed by Magainin Pharmaceuticals (later Genaera) as a topical treatment for mildly infected diabetic foot ulcers....

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Tyrocidine
Antimicrobial Peptide

Tyrocidine A is a cyclic decapeptide component of tyrothricin, one of the first antibiotic mixtures produced commercially. Isolated from Bacillus brevis soil bacteria, tyrocidines are non-ribosomally synthesized peptides that disrupt bacterial membranes through a carpet mechanism...

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Key Parameters
Parameter Pexiganan Tyrocidine
Category Antimicrobial Peptide Antimicrobial Peptide
Research Phase 3 (Failed 1999) Preclinical
Half-Life Hours (topical) Short
Typical Dose 0.8% cream topically N/A (component of tyrothricin)
Frequency Twice daily N/A
Route Topical cream Topical (historical)
FDA Status Not approved (failed Phase 3) Not approved (part of historical tyrothricin)

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Frequently Asked Questions
What is the difference between Pexiganan and Tyrocidine?
Pexiganan: Pexiganan (MSI-78) is a synthetic analog of magainin-2, optimized for enhanced broad-spectrum antimicrobial activity and reduced hemolytic toxicity. It was developed by Magainin Pharmaceuticals (later... Tyrocidine: Tyrocidine A is a cyclic decapeptide component of tyrothricin, one of the first antibiotic mixtures produced commercially. Isolated from Bacillus brevis soil bacteria, tyrocidines are non-ribosomally ...
Which has a longer half-life, Pexiganan or Tyrocidine?
Pexiganan half-life: Hours (topical). Tyrocidine half-life: Short.
Can you stack Pexiganan and Tyrocidine?
Pexiganan and Tyrocidine are in the same category and used together in research protocols. Always consult relevant literature and follow appropriate guidelines.

For research use only. Not medical advice. ASCEND does not conduct or endorse any specific research protocol. Always consult relevant scientific literature and regulatory guidelines.