Trintellix vs. Fluoxetine
See how Trintellix and Fluoxetine compare on approved uses, dosing, side effects, and cost.
Key Takeaways
Trintellix works through a different mechanism than SSRIs and tends to cause less sexual dysfunction and weight gain, but it has no generic and costs more each month.
Fluoxetine is a long-established, low-cost generic SSRI approved for a much wider range of conditions, including OCD, bulimia, and panic disorder.
Both drugs carry a boxed warning for increased suicidal thoughts in young people and can cause serotonin syndrome if combined with other serotonergic medications.
Trintellix vs. Fluoxetine Drug Summary
Trintellix
Trintellix is a serotonin modulator and stimulator, an atypical antidepressant used to treat major depressive disorder in adults. It's taken as a single tablet once a day, usually starting at 10 mg and increasing to a target dose of 20 mg as tolerated.
Fluoxetine
Fluoxetine is a selective serotonin reuptake inhibitor, one of the oldest and most widely used antidepressants. It's approved for depression, OCD, bulimia, and panic disorder in adults, and comes as a capsule, tablet, or oral solution taken once daily.
Trintellix vs. Fluoxetine Side Effects
Trintellix
Fluoxetine
Trintellix vs. Fluoxetine Dosage
Trintellix
Fluoxetine
| 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 |
| STAGE | DOSE | WHEN |
| Starting dose | 10 mg once daily | Week 1 |
| Maximum dose | 90 mg once weekly | If needed |
| Dose changes | 4 increases | Every week |
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 |
Fluoxetine
| STAGE | DOSE | WHEN |
| Starting dose | 10 mg once daily | Week 1 |
| Maximum dose | 90 mg once weekly | If needed |
| Dose changes | 4 increases | Every week |
Trintellix vs. Fluoxetine Indications
Trintellix
Trintellix is FDA-approved for one condition: major depressive disorder in adults. It has not been studied or approved for use in children, adolescents, or for any other psychiatric condition at this time.
Major depressive disorder (MDD) in adults
Not approved for children or adolescents
No other FDA-approved psychiatric indications
Fluoxetine
Fluoxetine has broad FDA approval covering depression, OCD, bulimia nervosa, and panic disorder in adults, plus depression and OCD in children. It is also used with olanzapine for bipolar and treatment-resistant depression.
Major depressive disorder in adults and children 8-18
Obsessive-compulsive disorder in adults and children 7-17
Bulimia nervosa in adults
Trintellix vs. Fluoxetine Pros and Cons
Trintellix
Trintellix is a newer, brand-only antidepressant with a distinct mechanism that may cause less sexual dysfunction and weight gain than many SSRIs. Its FDA approval is narrower, covering only adult MDD, and it costs significantly more without insurance.
Pros
Associated with lower rates of sexual dysfunction and weight gain than many SSRIs
Simple three-step titration with once-daily dosing
Different mechanism may help if SSRIs did not work well
FDA-approved specifically for adult MDD with established efficacy data
Cons
No generic version; costs roughly $465 to $650 per month without insurance
Nausea affects up to 32% of patients, dose-related
Not approved for children or adolescents
Only one FDA-approved indication (MDD)
Fluoxetine
Fluoxetine is a long-established, low-cost SSRI approved for depression, OCD, bulimia, and panic disorder, with pediatric approval for some conditions. It has more dosing complexity across indications and a long-documented side effect profile including insomnia.
Pros
Generic available; costs roughly $25 to $60 per month without insurance
FDA-approved for OCD, bulimia, panic disorder, and pediatric depression
Nearly four decades of clinical use and safety data
Long half-life allows once-weekly maintenance dosing option
Cons
Insomnia occurs in up to 33% of patients, more than any Trintellix side effect
More dosing regimens depending on indication treated
QT prolongation risk with pimozide or thioridazine
Headache reported in up to 21% of patients
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