Not if you’re resistant to the effect of aspirin.

It’s a fact. Approximately 25% of Americans are resistant to the beneficial effect of aspirin. If you are aspirin-resistant, taking aspirin daily is having no effect whatsoever on your risk for heart attack or stroke.

The good news is that aspirin effect is easy to test, and there are steps doctors can take to help patients when aspirin is not working.

AspirinWorks is the only FDA-cleared test that helps doctors accurately determine aspirin effect by measuring the urine levels of a metabolite of thromboxane, the target of aspirin therapy.