Taking some of the gamble out
Choosing a psychiatric medicine has always involved some trial and error. For most people the first or second choice works. For others, the list of failed medicines grows year after year. GeneSight, a genetic test from Myriad Genetics, gives your provider information about how your body is likely to handle many of those medicines, so the next pick is less of a roll of the dice.
What the lab looks at
A painless cheek swab is analyzed for variants in genes that shape how medicines are broken down and how the brain responds to them. CYP2D6 and CYP2C19, two liver enzyme genes, matter for many antidepressants. Slow versions can let medicine build up; fast versions can clear it before it works.
The report
Medicines are sorted into three groups by predicted gene-drug interaction: use as directed, moderate, and significant. Think of the third group as a caution flag. Your provider might choose a different medicine, start at a lower dose, or check in more often.
When testing pays off
- Two or more depression or anxiety medicines have already failed
- Standard doses gave you unusual side effects
- You take several medicines and interactions are a concern
If you are starting your very first psychiatric medicine, testing usually is not needed.
What studies show
The GUIDED trial reported higher response and remission rates when providers used GeneSight results, though it did not meet its main goal for average symptom improvement. Expert pharmacogenetic guidelines recommend adjusting several antidepressants based on CYP2D6 and CYP2C19 status. Good odds, not a sure thing.
What it is not
It is not a diagnosis, not a guarantee, and not FDA-approved for picking an antidepressant. Your provider reads it next to your full psychiatric evaluation, your history, and your goals.
Older Nevadans on many medicines
Retirees in Henderson, Summerlin, and Reno often take prescriptions from several doctors. Many of those medicines share liver enzymes with psychiatric drugs. A report plus a full medicine review can help avoid combinations that pile up.
A Las Vegas example
Picture a casino supervisor who felt shaky and nauseated on two antidepressants at low doses. A report might show slow CYP2D6 activity, meaning even small doses ran high. That could point the provider to a medicine processed another way, or a lower start.
Privacy
The report belongs in your protected medical record. GINA, a federal law passed in 2008, bars most employers from using genetic information in hiring and firing.
When to hold off
If you have tried only one medicine, and only for a few weeks, a full trial at the right dose usually comes first. Your provider will tell you straight whether a report would change anything now.
Family clues
If a parent or sibling had an unusually strong reaction to a psychiatric medicine, mention it. Each person needs their own test, but family history can point your provider in a useful direction.
Pain medicines and CYP2D6
Codeine and tramadol only work after CYP2D6 converts them into their active forms. A slow result can explain why those medicines never helped, and a very fast one can raise their risks. With your consent, the report can go to the doctor who manages your pain.
The steps
Talk with your provider about whether results could change a real decision. If so, the swab is done at any of our three offices. Your provider explains the report with you when it arrives.
Good for life
Genes stay the same, so the report stays relevant. With your consent, it can go to your other doctors too.
Getting started
Testing is ordered through your care with us and paired with medication management. Visit 3311 S Rainbow Blvd in Las Vegas, 303 S Water St in Henderson, or 5470 Kietzke Ln in Reno. Become a patient to ask about it.
Why Choose Silver State Mental Health?
- Now accepting new patients across Las Vegas, Reno, and all of Nevada - no 3-month waitlists
- Board-certified psychiatric providers, not just therapists
- We take most major insurance, plus Medicaid and Medicare — and keep costs transparent
- Real evaluations, not 10-minute med checks