Antidepressants - SSRI, Trintellix
Trintellix (Vortioxetine) and CYP2D6: Side Effects and Dosing
Vortioxetine is a newer antidepressant cleared mainly by CYP2D6. That single enzyme matters enough that drug labeling sets a lower maximum dose for slow metabolizers.
Reviewed by the Gene2Rx team. Updated 2026-06-23.
Looking for a different angle? Which antidepressant is right for me?
Vortioxetine, sold as Trintellix, is a newer antidepressant used for major depression. It works on serotonin in a slightly different way than older SSRIs, but like many antidepressants it is cleared mainly by the enzyme CYP2D6. How fast your CYP2D6 works, which is partly genetic, affects both how much drug builds up and what dose is right for you.
Why vortioxetine affects people differently
Nausea is the most common early effect
Nausea is the most frequently reported side effect of vortioxetine, especially when starting or increasing the dose, and it tends to be dose related. It often eases over the first couple of weeks.
It takes weeks to judge the benefit
Like other antidepressants, vortioxetine usually needs several weeks at an adequate dose before you can fairly judge whether it is helping. Stopping too early can look like failure when the drug simply has not had time.
Other medications can raise your levels
Strong CYP2D6 blockers, including paroxetine, fluoxetine, and bupropion, can push vortioxetine levels up, and labeling advises lowering the dose when they are combined. Tell your doctor about everything you take.
Your CYP2D6 genetics set the baseline
Before interactions, your CYP2D6 type sets how fast you clear vortioxetine, which is why a standard dose can feel very different from one person to the next.
For CYP2D6 poor metabolizers, the FDA caps vortioxetine at 10 mg per day, because the same dose produces much higher drug levels than in fast metabolizers.
How your genetics can play a role
Vortioxetine is cleared mainly by CYP2D6, and drug labeling ties the maximum dose to your CYP2D6 metabolizer type.
| Gene | What it affects |
|---|---|
| CYP2D6 | CYP2D6 is the primary enzyme that clears vortioxetine.[1] Reduced function variants are common, and FDA labeling sets a lower maximum dose for CYP2D6 poor metabolizers.[2] The same enzyme handles many antidepressants and opioids, so the result stays useful beyond this drug. |
If you are a CYP2D6 normal metabolizer, standard vortioxetine dosing applies. If you are a poor metabolizer, the drug clears slowly and reaches higher levels, so the FDA recommends a maximum dose of 10 mg per day rather than the usual higher maximum, which lowers the risk of dose-related side effects like nausea.[1] Ultrarapid metabolizers clear it faster and may need their response watched, since a standard dose can produce lower levels. Knowing your CYP2D6 status helps your doctor aim the dose correctly from the start.[3]
FDA labeling caps Trintellix at 10 mg for CYP2D6 poor metabolizers. Find out which metabolizer type you are.
A Gene2Rx report reads your own DNA to show how it may affect your response to Vortioxetine and your other medications.
When to consider pharmacogenetic testing
Pharmacogenetic testing is worth considering if vortioxetine causes heavy nausea or other side effects even at a low dose, if it is not helping at an adequate dose, or if you have had similar issues with other CYP2D6 antidepressants. The CYP2D6 result is useful across many psychiatric medications.
What you can do next
- Do not stop vortioxetine abruptly. Taper any change with your doctor to limit withdrawal effects.
- If nausea is the problem, ask whether taking it with food or adjusting the dose helps.
- Review your other medications with your doctor, especially strong CYP2D6 blockers.
- Consider pharmacogenetic testing to learn whether your CYP2D6 genetics raise your vortioxetine levels.
Related medications
See how genetics may affect your response to Vortioxetine, Paroxetine, Escitalopram, Sertraline.
Related guides
- Antidepressant Not Working? What to Know Before You Give Up
- Which Antidepressant Is Right for Me?
- Paroxetine Side Effects: Why Paxil Hits Some People Harder
- Venlafaxine Side Effects: When Effexor's Side Effects Are Too Much
- 23andMe Drug Response: What You'll Actually See in a Report From Your Data
- 23andMe Pharmacogenetics: How to Get a Drug Response Report From Your Existing Data
Frequently asked questions
Why does the FDA cap vortioxetine at 10 mg for some people?
Vortioxetine is cleared mainly by CYP2D6. People who are CYP2D6 poor metabolizers break it down slowly and reach much higher levels on a standard dose, so labeling sets a lower maximum of 10 mg per day for them to reduce dose-related side effects.
Is Trintellix the same as vortioxetine?
Yes. Trintellix, formerly sold as Brintellix, is the brand name for vortioxetine, so the same CYP2D6 considerations apply across brand and generic versions.
Could my CYP2D6 type be why Trintellix is not working?
It can contribute. Ultrarapid metabolizers clear vortioxetine quickly and may not reach a helpful level on a standard dose. If the drug is not working after a fair trial, a CYP2D6 result can help your doctor decide whether a dose change or a different antidepressant makes sense.
References
- U.S. Food and Drug Administration. Table of Pharmacogenomic Biomarkers in Drug Labeling (2024). fda.gov
- U.S. Food and Drug Administration. Table of Pharmacogenetic Associations (2024). fda.gov
- Clinical Pharmacogenetics Implementation Consortium (CPIC). CPIC Guidelines. cpicpgx.org
Could your CYP2D6 genetics set the right Trintellix dose for you?
Disclaimer: This content is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your healthcare provider before making changes to your medication. Never stop or change a medication without medical supervision.