Most genetic tests focus on your odds of developing certain diseases or health conditions. But some known as pharmacogenomic (or pharmacogenetic) tests can reveal how your body may respond and react to different medications. To date, researchers have identified more than 400 genetic variations known to affect the metabolism of numerous drugs, including some that help lower cholesterol or prevent blood clots (see "Pharmacogenomics of common heart drugs").

In theory, knowing how people metabolize specific drugs could help doctors choose the safest, most effective treatment for their patients. But in practice, it's not that straightforward, says Dr. Jason Vassy, assistant professor of medicine at Harvard Medical School and a primary care physician at the VA Boston Healthcare System.

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Genetic testing to tailor heart drug prescriptions? - Harvard Health - Harvard Health

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