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Medication Response

Medication response: when it comes to medications, one size doesn’t fit all.

Your genes can influence how your body processes certain medications, which can be useful information for your provider.

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When you take a medication, your response is influenced by many factors.

Your genes can influence how your body processes certain medications, which may influence your response.* Other factors also influence your response to medications:

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Health history

Your liver and kidneys may process medications differently depending on how well they are functioning.

Body size

Your height and weight can impact the ideal dose for you.

Other medications

Some medications may interact with each other when taken together.

Because there are so many factors to consider, each person’s reaction to specific medications may be unique. Your doctor can consider the genetic and non-genetic factors that influence medication response when prescribing your medications. Changes to medications should not be made on the basis of genetic tests alone.

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Color analyzes genes that can influence how your body processes certain medications.

What Color covers

We look at 14 genes associated with how the body processes certain commonly prescribed medications.

Learn more about the benefits and limitations of genetic testing for medication response

Always talk to your doctor before making any changes to your medications.

Changing medications or dosing on your own could be harmful to your health

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You’ll learn how your genetics may influence your response to some medications.

Your results will not tell you definitively if a medication will not work for you or cause you to experience side effects.

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That’s because other factors beyond genetics also influence your response to medications.

When prescribing your medications, your doctor can consider genetic information and non-genetic factors like health history, body weight, and other medications you take that also play a role in how your body processes medications.

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Useful Resources


National Institute of General Medical Sciences

A fact sheet about pharmacogenomics from the National Institutes of Health.


National Human Genome Research Institute

A list of Frequently Asked Questions about pharmacogenomics for patients and the public.

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A pharmacogenomics resource sponsored by the National Institutes of Health that collects information on gene variants and drug responses.

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Get to know what your genes say about your risk for common hereditary cancers and heart conditions, plus how your body processes certain medications.

* Do not change or stop taking any medicine based on a genetic test report without consulting your healthcare provider. This test is not intended to inform you about your current state of health, including whether or not you should take a medication or how much you should take. This test does not diagnose any health conditions and is not a substitute for visiting your health care provider. Discuss the results of the genetic test with your healthcare provider, including whether the medication label includes information on how to use genetic information to determine dosage. Medicine should always be taken as prescribed by your healthcare provider.