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Published on: October 12, 2012
Low dose aspirin estimation: an application to a human pharmacokinetic study
D Vijaya Bharathi1, Kishore Kumar Hotha, Pandu Ranga Reddy Kolagatla
1Bioanalytical Department, Integrated Product Development, Dr Reddy's Laboratories Ltd, Bachupalli, Hyderabad-500 072, India. vijayabd@drreddys.com
Biomedical Chromatography : BMC
|October 20, 2012
Summary
A new method accurately measures low aspirin and salicylic acid levels in plasma, aiding heart attack prevention research. This validated assay enables precise pharmacokinetic studies at room temperature.
Area of Science:
- Pharmacology
- Analytical Chemistry
Background:
- Aspirin is crucial for preventing heart attacks across various dosages.
- Accurate measurement of aspirin and its metabolite, salicylic acid, in plasma is essential for therapeutic monitoring and research.
Purpose of the Study:
- To develop and validate a sensitive, robust analytical method for quantifying low levels of aspirin and salicylic acid in human plasma.
- To establish a novel sample collection and preparation procedure suitable for room temperature processing.
Main Methods:
- Development and validation of a high-performance liquid chromatography (HPLC) method for aspirin and salicylic acid quantification.
- Validation included assessment of linearity, lower limit of quantitation (LLOQ), intra- and inter-day precision, and accuracy in human plasma.
- Sample preparation was optimized for room temperature to enhance practicality.
Main Results:
- The method achieved an LLOQ of 0.99 ng/mL for aspirin and 2.01 ng/mL for salicylic acid.
- Linearity was demonstrated over wide concentration ranges (aspirin: 0.99-756.20 ng/mL; salicylic acid: 2.01-2486.86 ng/mL) with high correlation coefficients (r > 0.998).
- Assay precision met Food and Drug Administration (FDA) guidelines, indicating reliability.
Conclusions:
- A sensitive, robust, and rapid (3.00 min run time) analytical method for aspirin and salicylic acid in plasma was successfully developed and validated.
- The novel room temperature sample preparation procedure increases the method's applicability.
- The validated assay is suitable for use in human pharmacokinetic studies, supporting research in aspirin's therapeutic applications.
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