Side-by-Side Comparison · 2026

Polymyxin B vs Teixobactin

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

Polymyxin B
Antimicrobial Peptide

Polymyxin B is a cyclic lipopeptide antibiotic from Bacillus polymyxa that was approved in the 1960s and fell out of favor due to nephrotoxicity, but has experienced a major clinical resurgence as a last-resort treatment for carbapenem-resistant Gram-negative infections (Acinetob...

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Teixobactin
Antimicrobial Peptide

Teixobactin was reported in Nature in 2015 as the first new antibiotic class discovered in 30 years, isolated from uncultured soil bacteria Eleftheria terrae using the iChip (isolation chip) technology that allows cultivation of previously unculturable organisms. Teixobactin bind...

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Key Parameters
Parameter Polymyxin B Teixobactin
Category Antimicrobial Peptide Antimicrobial Peptide
Research FDA Approved Preclinical
Half-Life 6-8 hours Hours (in vivo)
Typical Dose 15,000-25,000 units/kg/day IV N/A
Frequency Every 12 hours IV N/A
Route IV / IM / Topical / Intrathecal Research only (IV in animal studies)
FDA Status Approved (systemic Gram-negative infections) Not approved (preclinical)

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Frequently Asked Questions
What is the difference between Polymyxin B and Teixobactin?
Polymyxin B: Polymyxin B is a cyclic lipopeptide antibiotic from Bacillus polymyxa that was approved in the 1960s and fell out of favor due to nephrotoxicity, but has experienced a major clinical resurgence as a l... Teixobactin: Teixobactin was reported in Nature in 2015 as the first new antibiotic class discovered in 30 years, isolated from uncultured soil bacteria Eleftheria terrae using the iChip (isolation chip) technolog...
Which has a longer half-life, Polymyxin B or Teixobactin?
Polymyxin B half-life: 6-8 hours. Teixobactin half-life: Hours (in vivo).
Can you stack Polymyxin B and Teixobactin?
Polymyxin B and Teixobactin 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.