Wellbutrin vs. Trintellix
See how Wellbutrin and Trintellix compare on approved uses, dosing, side effects, and cost.
Key Takeaways
Wellbutrin works on norepinephrine and dopamine, while Trintellix works on serotonin, so the two treat depression through entirely different brain pathways.
Both are less likely than many SSRIs to cause sexual side effects or significant weight gain, but each carries its own distinct risk: seizures for Wellbutrin, serotonin syndrome for Trintellix.
Wellbutrin is dosed multiple times a day as an older, generic-available drug, while Trintellix is a once-daily, brand-only tablet with no generic yet.
Wellbutrin vs. Trintellix Drug Summary
Wellbutrin
Wellbutrin (bupropion) is an aminoketone antidepressant that raises norepinephrine and dopamine rather than serotonin. It is FDA-approved for major depressive disorder and taken as an oral tablet, with the immediate-release form dosed two to three times daily. It is also used off-label for ADHD and to counter sexual side effects caused by other antidepressants.
Trintellix
Trintellix (vortioxetine) is a serotonin modulator and stimulator, a newer antidepressant class distinct from SSRIs and SNRIs. It is FDA-approved for major depressive disorder in adults and taken as a single tablet once a day. Its multi-pathway action on serotonin receptors is thought to contribute to its comparatively low rates of sexual side effects.
Wellbutrin vs. Trintellix Side Effects
Wellbutrin
Trintellix
Wellbutrin vs. Trintellix Dosage
Wellbutrin
Trintellix
| STAGE | DOSE | WHEN |
| Starting dose | 200 mg/day (100 mg BID) | Days 1-3 |
| Maximum dose | 450 mg/day (150 mg TID) | If needed |
| Dose changes | 2 increases | Every 3 days |
| STAGE | DOSE | WHEN |
| Starting dose | 10 mg once daily | At the start |
| Maximum dose | 5 mg once daily | If needed |
| Dose changes | 2 increases | As tolerated |
Wellbutrin
| STAGE | DOSE | WHEN |
| Starting dose | 200 mg/day (100 mg BID) | Days 1-3 |
| Maximum dose | 450 mg/day (150 mg TID) | If needed |
| Dose changes | 2 increases | Every 3 days |
Trintellix
| STAGE | DOSE | WHEN |
| Starting dose | 10 mg once daily | At the start |
| Maximum dose | 5 mg once daily | If needed |
| Dose changes | 2 increases | As tolerated |
Wellbutrin vs. Trintellix Indications
Wellbutrin
Wellbutrin is FDA-approved only for major depressive disorder, though clinicians frequently prescribe it off-label for other conditions. Its stimulating effect on dopamine and norepinephrine makes it a common choice when sedation or weight gain from other antidepressants is a concern. It is not approved for anxiety disorders, bipolar disorder, or smoking cessation under this brand name.
Major depressive disorder (FDA-approved)
ADHD in adults and children (off-label)
Adjunct for bipolar depression (off-label)
Antidepressant-induced sexual dysfunction (off-label)
Trintellix
Trintellix is FDA-approved only for major depressive disorder in adults, with no established off-label uses in current practice. Its distinct serotonin-modulating mechanism makes it an option for patients who have not responded well to SSRIs or SNRIs. It is not approved for use in children or adolescents.
Major depressive disorder in adults (FDA-approved)
Option for SSRI/SNRI non-responders
Not approved for pediatric use
No established off-label uses
Wellbutrin vs. Trintellix Pros and Cons
Wellbutrin
Wellbutrin's dopamine and norepinephrine mechanism sets it apart from most antidepressants, and its long history means it is widely available as a generic. Because it carries a seizure risk, it is not an option for people with seizure disorders or certain eating disorder histories.
Pros
Available as a lower-cost generic option
Non-sedating, may boost energy and focus
Long clinical track record since 1985
Also prescribed off-label for ADHD and obesity
Cons
Carries a seizure risk not shared by Trintellix
Contraindicated with seizure or eating disorder history
Not approved for anxiety disorders
Immediate-release form needs 2-3 doses a day
Trintellix
Trintellix's once-daily dosing and multimodal serotonin mechanism appeal to patients who have not done well on SSRIs, but it remains brand-only with no generic alternative. Nausea is its most frequently reported side effect, particularly during the first weeks of treatment.
Pros
Only needs to be taken once a day
Distinct receptor mechanism may help SSRI non-responders
No seizure risk linked to Wellbutrin's drug class
FDA-approved specifically for adults with MDD
Cons
No generic version, so cost stays higher
Nausea is common, especially when starting treatment
Carries a serotonin syndrome risk with other serotonergic drugs
Not established for use in children or adolescents
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