Aspirin is widely used to prevent heart attacks, strokes and blood clot, but the Telegraph reported that a review of 20 studies involving 3000 patients has found 28% do not respond to aspirin and there is no standard test to establish who are resistant to the drug.
The author concluded that "patients who are resistant to aspirin are at a greater risk of clinically important cardiovascular morbidity long term than patients who are sensitive to aspirin" and called for further research. The report was published in the BMJ.
Source: Aspirin "resistance" and risk of cardiovascular morbidity: systematic review and meta-analysis BMJ, doi:10.1136/bmj.39430.529549.BE (published 17 January 2008)
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