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- Title
Stability of furosemide and chlorothiazide stored in syringes.
- Authors
CIES, JEFFREY J.; MOORE II, WAYNE S.; CHOPRA, ARUN; LU, GUIZHEN; MASON, ROBERT W.
- Abstract
Purpose. The results of a study to determine the stability of solutions of furosemide and chlorothiazide over 96 hours are reported. Methods. Chlorothiazide and furo-semide were diluted in 5% dextrose USP to final concentrations of 10 and 1 mg/mL, respectively, and combined. In addition, sample solutions of chlorothiazide in dextrose, furosemide in dextrose, and dextrose alone were prepared for control purposes. The resulting solutions were analyzed immediately after preparation and 24, 48, 72, and 96 hours later using a liquid chromatography-tandem mass spectros-copy (LC-MS/MS) system with an elec-trospray ionization source. Mixtures and samples were diluted 10,000-fold prior to LC-MS/MS analysis so that concentrations of both drugs would be within the assay's linear range of detection. Results. LC-MS/MS analysis showed that chlorothiazide typically eluted at 2.6 minutes and furosemide at 4.8 minutes. Each compound was degraded by exposure to strong ultraviolet light in a time-dependent manner. Both unmixed and mixed solutions retained over 90% of the original concentrations of chlorothiazide and furosemide for up to 96 hours. Furosemide and chlorothiazide are commonly used concomitantly to maximize diuresis in pediatric patients; the study findings suggest that solutions of furosemide and chlorothiazide can be combined in the same syringe without loss of stability for up to 96 hours. Conclusion. Solutions of chlorothiazide (10 mg/mL) and furosemide (1 mg/mL) stored either separately or together in polypropylene syringes remained stable for up to 96 hours at room temperature and protected from light.
- Subjects
CHLOROTHIAZIDE; FUROSEMIDE; LIQUID chromatography; MASS spectrometry; RESEARCH funding; SYRINGES; STATISTICAL reliability; IN vitro studies
- Publication
American Journal of Health-System Pharmacy, 2015, Vol 72, Issue 24, p2182
- ISSN
1079-2082
- Publication type
Article
- DOI
10.2146/ajhp150023