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JOURNAL ARTICLE
REVIEW
Analytical methodologies used for the determination of colistin in biological fluids. Is it still a challenge?
Journal of Pharmaceutical and Biomedical Analysis 2018 November 20
Colistin is a multicomponent polypeptide antibiotic consisting mainly of colistin A and colistin B, produced by selected strains of Bacillus polymyxa var. Colistinus. Only recently, the prodrug of colistin, colistimethate sodium, is widely used as last resort antibiotic for infections caused by resistant gram-negative bacteria. Colistin having been discovered several years ago, has not subjected to the drug development and regulatory approval processes that are applied today. However, pharmacological and pharmacokinetic information are necessary for its optimal use thus, during the last decades several studies are carried out in order to shed light on this issue. In the current review, the analytical methodologies of colistin assessment in biological material are summarized and the analytical challenges are critically discussed and critical aspects of the determinations such as the method of detection, the sample pretreatment methodology etc. are compared. Furthermore, critical quality aspects of the assessment methodologies such as the sensitivity of the currently developed methodologies are presented. Lastly, some future trends that should be incorporated in the determination pipeline of modern drugs are suggested.
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