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Chinese Journal of Clinical Pharmacology and Therapeutics ›› 2026, Vol. 31 ›› Issue (4): 568-576.doi: 10.12092/j.issn.1009-2501.2026.04.017

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Research progress in pharmacokinetics and pharmacodynamics of polymyxin B in special populations

Zexuan TIAN(), Shizhuo LIU, Linan WANG, Yutian ZHANG, Yingchao MA, Xiuling YANG()   

  1. Department of Pharmacy, The Second Hospital of Hebei Medical University, Shijiazhuang 050000, Hebei, China
  • Received:2025-03-20 Revised:2025-08-15 Online:2026-04-26 Published:2026-04-30
  • Contact: Xiuling YANG E-mail:2645152965@qq.com;26700002@hebmu.edu.cn

Abstract:

As a key drug for the treatment of carbapenem-resistant gram-negative bacilli (CR-GNB) infections, polymyxin B exhibits differences in its pharmacokinetic (PK) characteristics among special populations, thus requiring the formulation of individualized dosing regimens based on patient characteristics. This article summarizes the PK, pharmacodynamic (PD) characteristics and applications of polymyxin B in special populations: for pediatric patients, a dose of 1.5-3.0 mg·kg?1·d?1 is recommended; for elderly patients, a fixed dose of 100-150 mg q12h may be used; for obese patients, based on adjusted body weight (ABW), a loading dose of 2.5 mg/kg and a maintenance dose of 1.25-1.5 mg/kg q12h may be considered, with a daily dose upper limit of 250 mg; for patients with hepatic dysfunction, the dose recommended in the guidelines (1.25-1.5 mg/kg q12h) can be used without adjustment; for patients with renal insufficiency, the dose should be adjusted based on creatinine clearance (CrCL): a fixed dose of 75 mg q12h is recommended for those with mild renal insufficiency (60≤CrCL<90 mL/min); 50 mg q12h for those with moderate renal insufficiency (30≤CrCL<60 mL/min); 30-40 mg q12h for those with severe renal insufficiency (15≤CrCL<30 mL/min); and a fixed dose of 100 mg q12h is recommended for patients undergoing continuous renal replacement therapy (CRRT).

Key words: polymyxin B, pharmacokinetics, pharmacodynamics, special populations

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