Harvard Heart Letter

Genetic help for a blood-thinner balancing act

The FDA is recommending a genetic test for people prescribed warfarin, to search for variants of certain genes that can affect the drug's effectiveness. But there is not enough evidence yet that the test makes using the drug safer.
To continue reading this article, you must login.
  • Research health conditions
  • Check your symptoms
  • Prepare for a doctor's visit or test
  • Find the best treatments and procedures for you
  • Explore options for better nutrition and exercise
Learn more about the many benefits and features of joining Harvard Health Online »