CYP2D6/Fluoxetine Pharmacogenomic Lab Test
CYP2D6 testing is used to determine potential risk for side effects to antidepressant medication like fluoxetine (Prozac®)
Routine CYP2D6 testing for fluoxetine (Prozac®) is usually not done at this time. Your health care provider will decide if this test is appropriate for you
Your health care provider evaluates your test results and uses this information, along with your other health information, to make recommendations for appropriate treatment options
CYP2D6 Test Results
What should I do with my test results?
Talk to your health care provider or pharmacist about the results. They may suggest that you:
- Keep taking a medication
- Change the dose of a medication
- Stop taking a medication
- Take a different medication
What does my CYP2D6 result mean
poor to intermediate
Consider an alternative due to an increased risk of drug side effects
Who will see my results?
Only health care professionals, and those individuals to whom you have given permission, see your genetic test results. If you are receiving care at another medical facility, Mayo Clinic recommends you share this information with your other health care providers.
How could the CYP2D6 test result affect my treatment with fluoxetine?
If you have a CYP2D6 gene variant, then your health care provider may suggest you take a different medication or adjust the dose of the current medication.
What is fluoxetine?
Fluoxetine (Prozac®), is an antidepressant. Fluoxetine is used in individuals suffering from depression, panic disorder, OCD (Obsessive Compulsive Disorder), etc.
Which gene affects my response to fluoxetine?
Variants in a gene called CYP2D6, influence the way your body processes (metabolizes) fluoxetine and can affect your response to this medication.
What problems can patients with the CYP2D6 gene variants have when taking fluoxetine?
Patients who have a CYP2D6 gene variant process (metabolize) fluoxetine differently than patients without the gene variant. Talk with your health care provider about other medications that may be a better option for you.
Poor metabolism and poor to intermediate metabolism of this drug by CYP2D6 has been associated with the potential for increased risk of drug side effects.
Where can I find more information about fluoxetine?
More information about fluoxetine you might find helpful includes:
- Drugs and Supplements – Fluoxetine (oral route): Mayoclinic.org
These resources may help you understand more about individualized medicine, genomics and drug-gene testing (pharmacogenomics):
- Mayo Clinic Center for Individualized Medicine
- Cytochrome P450 (CYP450) tests
- Frequently Asked Questions About Pharmacogenomics from National Institutes of Health (NIH) National Human Genome Research Institute
- Table of Pharmacogenomic Biomarkers in Drug Labeling from the U.S. Food and Drug Administration (FDA)
- Genetic Information Nondiscrimination Act
- eMERGE Network: Electronic Medical Records and Genomics
- MyResults.org: Test Results
If you have questions about your test results, ask to speak with your health care provider at your Mayo Clinic care location: