Trintellix (Vortioxetine) Dosing
Start vortioxetine at 10 mg once daily, then increase to 20 mg daily as tolerated, which is the most effective dose for major depressive disorder. 1
Standard Dosing Regimen
Initial dose: 10 mg orally once daily without regard to meals 1
Target dose: 20 mg once daily, as tolerated 1
- Increase to 20 mg/day after tolerating the initial 10 mg dose
- The 20 mg dose demonstrates significantly greater efficacy than 10 mg (mean MADRS improvement difference of -1.03 points, p<0.05) 2
- In clinical practice, approximately 48% of patients are increased to 20 mg after just 1 week, and 64% ultimately receive 20 mg as their final dose 2
Lower dose option: 5 mg once daily for patients who cannot tolerate higher doses 1
Dose Modifications
CYP2D6 Poor Metabolizers
Maximum dose: 10 mg daily 1
- Vortioxetine is primarily metabolized by CYP2D6 enzymes
- Poor metabolizers have significantly reduced drug clearance requiring dose reduction 3
Strong CYP2D6 Inhibitors (e.g., bupropion, fluoxetine, paroxetine)
Reduce vortioxetine dose by half when coadministered 1
Strong CYP Inducers (e.g., rifampin)
Consider increasing vortioxetine dose when coadministered for >14 days, up to 3 times the original dose maximum 1
Discontinuation
Vortioxetine can be discontinued abruptly 1. However, for doses of 15-20 mg daily, taper to 10 mg daily for one week before full discontinuation if possible 1
Timing and Tolerability
- Steady-state concentrations: Achieved within 2 weeks of dosing 3
- Half-life: Approximately 66 hours 3
- Onset of efficacy: Significant separation from placebo occurs at week 2 for the 20 mg dose, but not until week 4 for the 10 mg dose 2
Managing Nausea (Most Common Side Effect)
While the FDA label does not specify slow titration, emerging evidence suggests that gradual dose escalation using oral drop solutions (starting at 1-2 mg and increasing by 1-2 mg increments) markedly reduces nausea (9.6% at week 1 vs. higher rates with standard tablets) without compromising efficacy 4. However, this approach is not part of standard FDA-approved dosing.
Standard tablet dosing does not appear to significantly increase nausea with rapid escalation to 20 mg, likely due to vortioxetine's unique receptor profile 5.
Special Populations
No dose adjustment needed for:
Clinical Pearls
- The 20 mg dose is significantly more effective than 10 mg and should be the target for most patients 6, 2
- Tolerability at 20 mg is similar to 10 mg 2
- Can be taken without regard to meals 1
- For treatment-resistant depression (after SSRI/SNRI failure), rapid escalation to 20 mg by day 8 achieves 32-55% remission rates 5