Development and validation of a liquid chromatography-tandem mass spectrometry method for the assay of tafamidis in rat plasma: Application to a pharmacokinetic study in rats.

•Although tafamidis is currently used, there is no report on its quantitative analysis.•An LC–MS/MS method for the assay of tafamidis in rat plasma was developed.•The method was simple, accurate, and precise.•The method was successfully applied to a pharmacokinetic study in rats.