GeneSight Testing in Flagstaff at Grand Canyon Psychiatry and Mental Health

Why did my last few medicines fail?

It is one of the most common questions we hear in Flagstaff. Maybe an antidepressant did nothing for three months. Maybe another made you so sleepy you could not work a shift at the hospital, or so jittery you could not sit through a lecture at NAU. There are many possible reasons: the dose, the timing, the wrong diagnosis, other medicines, alcohol, or simply bad luck. Sometimes, part of the answer is written in your genes. That is the part GeneSight looks at.

What does a cheek swab have to do with it?

Your liver clears most psychiatric medicines using a family of enzymes, and your genes decide how busy those enzymes are. GeneSight, made by Myriad Genetics, reads a sample from a cotton swab rubbed inside your cheek. The lab checks genes such as CYP2D6 and CYP2C19. Some people carry versions that work in slow motion, so a normal dose piles up and causes side effects. Others carry versions that work in overdrive, so the medicine is gone before it can help.

What comes back from the lab?

You get a color-coded report. Medicines land in one of three columns, from no expected gene problem to a significant gene-drug interaction. Think of it like a trail map with caution signs: a caution sign does not close the trail, but it tells your provider to pick a different route, start with a smaller step, or check in more often.

Is this test a good fit for me?

It is most worth doing if you can say yes to one of these:

• I have tried at least two medicines for depression or anxiety, and none worked well
• Ordinary doses gave me side effects most people do not get
• I take a long list of medicines, and my doctors worry about interactions

If you have never taken a psychiatric medicine, most people do well with standard first choices, and testing usually waits.

How good is the evidence?

Honest answer: helpful, not magic. In a large study called GUIDED, people whose care used GeneSight results were more likely to improve and to reach remission, but the study did not hit its main target for average symptom change. Separately, expert panels publish dosing advice for several antidepressants based on CYP2D6 and CYP2C19 results, and your provider follows that guidance.

What can it not tell me?

It cannot diagnose you, and it cannot name the one medicine that will work. The FDA has not cleared it for picking antidepressants. Your story, your symptoms, and your goals still come first, which is why testing sits on top of a full psychiatric evaluation, never in place of one.

A concern we hear in northern Arizona

Genetic testing carries real history here. In the 1990s, blood the Havasupai Tribe gave to university researchers for a diabetes study was later used for other research without consent. The tribe sued, the case settled in 2010, and the samples were returned. The Navajo Nation placed a moratorium on genetic research in 2002. GeneSight is a clinical test ordered only for your own treatment, not a research project. You can read the lab's privacy notice first, ask your provider anything, and say no. It is always your choice.

Who sees my results?

Your report goes into your medical record and is protected like the rest of it. A federal law from 2008, GINA, keeps most employers from using genetic information when hiring, firing, or promoting. With your permission, we can send the report to your other prescribers, including an IHS or tribal clinic provider.

How long are the results good for?

For life. Your genes do not change, so a report from this year can still guide a choice ten years from now.

How do I start?

Ask about testing at any visit. If it fits, the swab takes a minute, and your provider walks through the report with you when it returns, then folds it into medication management. We are at 1120 W University Ave. Become a patient to begin.