Side-by-Side Comparison · 2026

Colistin vs Dermcidin

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

Colistin
Antimicrobial Peptide

Colistin (polymyxin E) is a cyclic lipopeptide antibiotic structurally related to polymyxin B, differing in the fatty acid chain and one amino acid residue. Like polymyxin B, colistin targets LPS and disrupts outer membranes of Gram-negative bacteria....

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Dermcidin
Antimicrobial Peptide

Dermcidin is a constitutively expressed antimicrobial peptide produced by eccrine sweat glands of human skin. It is secreted as a precursor and processed in sweat to yield active peptides that protect the skin surface from bacterial colonization....

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Key Parameters
Parameter Colistin Dermcidin
Category Antimicrobial Peptide Antimicrobial Peptide
Research FDA Approved Preclinical
Half-Life Colistimethate (prodrug): 2-3 hours; active colistin: 14 hours Hours (sweat)
Typical Dose 2.5-5 mg/kg/day CBA IV N/A (endogenous)
Frequency Every 8-12 hours Constitutive
Route IV (colistimethate) / Inhaled / Topical Endogenous (sweat glands)
FDA Status Approved (systemic Gram-negative infections) Not approved

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Frequently Asked Questions
What is the difference between Colistin and Dermcidin?
Colistin: Colistin (polymyxin E) is a cyclic lipopeptide antibiotic structurally related to polymyxin B, differing in the fatty acid chain and one amino acid residue. Like polymyxin B, colistin targets LPS and ... Dermcidin: Dermcidin is a constitutively expressed antimicrobial peptide produced by eccrine sweat glands of human skin. It is secreted as a precursor and processed in sweat to yield active peptides that protect...
Which has a longer half-life, Colistin or Dermcidin?
Colistin half-life: Colistimethate (prodrug): 2-3 hours; active colistin: 14 hours. Dermcidin half-life: Hours (sweat).
Can you stack Colistin and Dermcidin?
Colistin and Dermcidin 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.