Side-by-Side Comparison · 2026

Arenicin vs Pexiganan

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

Arenicin
Antimicrobial Peptide

Arenicin is a beta-hairpin antimicrobial peptide isolated from the coelomocytes of the lugworm Arenicola marina. It features a cyclic disulfide-bridged structure that confers broad-spectrum antibacterial and antifungal activity....

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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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Key Parameters
Parameter Arenicin Pexiganan
Category Antimicrobial Peptide Antimicrobial Peptide
Research Preclinical Phase 3 (Failed 1999)
Half-Life Short (minutes in plasma) Hours (topical)
Typical Dose N/A (research only) 0.8% cream topically
Frequency N/A Twice daily
Route Topical / Systemic (research) Topical cream
FDA Status Not approved Not approved (failed Phase 3)

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Frequently Asked Questions
What is the difference between Arenicin and Pexiganan?
Arenicin: Arenicin is a beta-hairpin antimicrobial peptide isolated from the coelomocytes of the lugworm Arenicola marina. It features a cyclic disulfide-bridged structure that confers broad-spectrum antibacter... 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...
Which has a longer half-life, Arenicin or Pexiganan?
Arenicin half-life: Short (minutes in plasma). Pexiganan half-life: Hours (topical).
Can you stack Arenicin and Pexiganan?
Arenicin and Pexiganan 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.