Paxil vs. Trintellix
See how Paxil and Trintellix compare on approved uses, dosing, side effects, and cost.
Key Takeaways
Paxil is an SSRI approved for depression and five anxiety-related disorders, while Trintellix is only FDA-approved for major depressive disorder in adults.
Trintellix tends to cause less sexual dysfunction and weight gain than Paxil, but it costs significantly more since no generic version exists.
Paxil has a shorter half-life that can cause more noticeable withdrawal symptoms, while Trintellix's dosing involves just one titration step.
Paxil vs. Trintellix Drug Summary
Paxil
Paxil (paroxetine) is a selective serotonin reuptake inhibitor (SSRI) approved for major depressive disorder and several anxiety disorders, including OCD, panic disorder, and PTSD. It's taken as a once-daily oral tablet, with extended-release and liquid versions also available.
Trintellix
Trintellix (vortioxetine) is a serotonin modulator, a newer type of antidepressant with a mechanism distinct from SSRIs, approved only for major depressive disorder in adults. It's taken as a once-daily oral tablet, typically starting at 10 mg before moving to a target dose.
Paxil vs. Trintellix Side Effects
Paxil
Trintellix
Paxil vs. Trintellix Dosage
Paxil
Trintellix
| STAGE | DOSE | WHEN |
| Starting dose | 20 mg once daily | At the start |
| Maximum dose | 50 mg once daily | If needed |
| Dose changes | 3 increases | As tolerated |
| STAGE | DOSE | WHEN |
| Starting dose | 10 mg once daily | Week 1 |
| Maximum dose | 5 mg once daily | If needed |
| Dose changes | 2 increases | Every week |
Paxil
| STAGE | DOSE | WHEN |
| Starting dose | 20 mg once daily | At the start |
| Maximum dose | 50 mg once daily | If needed |
| Dose changes | 3 increases | As tolerated |
Trintellix
| STAGE | DOSE | WHEN |
| Starting dose | 10 mg once daily | Week 1 |
| Maximum dose | 5 mg once daily | If needed |
| Dose changes | 2 increases | Every week |
Paxil vs. Trintellix Indications
Paxil
Paxil is FDA-approved for depression and several anxiety disorders, including OCD, panic disorder, social anxiety disorder, GAD, and PTSD. This broad approval makes it a common choice when depression overlaps with anxiety.
Major depressive disorder
Obsessive-compulsive disorder
Panic disorder
Social anxiety disorder
Trintellix
Trintellix's FDA approval is limited to major depressive disorder in adults. It is sometimes used off-label for anxiety disorders or for depression with prominent cognitive symptoms, though these uses aren't backed by FDA approval.
Major depressive disorder (MDD) in adults
Sometimes used off-label for anxiety disorders
Sometimes used off-label for cognitive symptoms
Not approved for children or adolescents
Paxil vs. Trintellix Pros and Cons
Paxil
Paxil has decades of clinical use and broad FDA approval across mood and anxiety disorders, backed by generic availability that keeps costs low. It carries a higher burden of sedation, weight gain, and drug interactions, plus a more difficult discontinuation process than newer antidepressants.
Pros
FDA-approved for six conditions, not just depression, including OCD, panic disorder, and PTSD
Available as a low-cost generic, roughly $300 to $310 per month without insurance
Decades of real-world use since its 1992 approval
Available in immediate-release, extended-release, and liquid forms
Cons
Higher rates of sedation and drowsiness than Trintellix
Strong CYP2D6 inhibitor that can raise levels of many other medications
Short half-life often causes more noticeable withdrawal symptoms if stopped abruptly
Associated with more sexual dysfunction and weight gain than Trintellix
Trintellix
Trintellix's distinct mechanism gives it a favorable side effect profile with less sexual dysfunction and weight gain, but it's the pricier option since no generic exists. Its FDA approval is narrower than Paxil's, covering only major depressive disorder.
Pros
Lower rates of sexual dysfunction and weight gain than Paxil
Simple once-daily dosing with only one titration step
Distinct serotonin modulator mechanism, an option if SSRIs haven't worked
Less likely to cause sedation or drowsiness
Cons
No generic available, roughly $465 to $650 per month without insurance
Only FDA-approved for major depressive disorder, not anxiety or OCD
Nausea rates can run higher than Paxil's, especially early in treatment
Newer drug with less long-term real-world data since its 2013 approval
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