Simultaneous determination of trimethoprim and sulfamethoxazole in dried plasma and urine spots.
BACKGROUND: Trimethoprim-sulfamethoxazole (TMP-SMX) is an antimicrobial drug combination commonly prescribed in children and adults. The study objectives were to validate and apply an HPLC-MS/MS method to quantify TMP-SMX in dried plasma spots (DPS) and dried urine spots (DUS), and perform a comparability analysis with liquid matrices. RESULTS: For TMP the validated range was 100-50,000 ng/ml for DPS and 500-250,000 ng/ml for DUS; for SMX, the validated range was 1000-500,000 ng/ml for both DPS and DUS. Good agreement was noted between DPS/DUS and liquid plasma and urine samples for TMP, while only modest agreement was observed for SMX in both matrices. CONCLUSION: A precise, accurate and reproducible method was developed to quantify TMP-SMX in DPS and DUS samples.
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Related Subject Headings
- Urinalysis
- Trimethoprim, Sulfamethoxazole Drug Combination
- Time Factors
- Tandem Mass Spectrometry
- Humans
- Dried Blood Spot Testing
- Chromatography, High Pressure Liquid
- Child
- Calibration
- Adult
Citation
Published In
DOI
EISSN
Publication Date
Volume
Issue
Start / End Page
Location
Related Subject Headings
- Urinalysis
- Trimethoprim, Sulfamethoxazole Drug Combination
- Time Factors
- Tandem Mass Spectrometry
- Humans
- Dried Blood Spot Testing
- Chromatography, High Pressure Liquid
- Child
- Calibration
- Adult