Kinetics of polythiazide.
An assay for polythiazide, sufficiently sensitive to measure plasma concentrations of this high-potency diuretic agent, has been developed. The assay is based on acid hydrolysis to trifluoroethylthioacetaldehyde and electron-capture gas chromatography. Sensitivity down to 0.2 ng/ml was achieved. In a study in normal human subjects receiving single 1-mg oral doses of polythiazide, the mean plasma half-lives for absorption and elimination were 1.2 and 25.7 hr, respectively. The latter is consistent with the extended duration of action of polythiazide. Approximately 25% of the drug was excreted unchanged in the urine.[1]References
- Kinetics of polythiazide. Hobbs, D.C., Twomey, T.M. Clin. Pharmacol. Ther. (1978) [Pubmed]
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