What is the recommended starting dose of vortioxetine (Trintellix) for an adult patient?

Starting Dose for Trintellix

The recommended starting dose of vortioxetine (Trintellix) is 10 mg once daily, administered orally without regard to meals 1.

Dosing Algorithm

Initial Dosing

• Start at 10 mg/day for most adult patients 1
• Take once daily at any time, with or without food 1
• No titration required to reach the starting therapeutic dose

Dose Adjustments After Initiation

Upward titration:

• Increase to 20 mg/day as tolerated to optimize therapeutic response 1
• The 20 mg dose showed superior efficacy in clinical trials compared to lower doses 1, 2
• Recent evidence supports early dose escalation to 20 mg by week 2 (as early as day 8) in patients who fail initial SSRI/SNRI therapy, which achieved 32-55% remission rates 3

Downward adjustment:

• Consider 5 mg/day only for patients who cannot tolerate higher doses 1
• Note: Two U.S. studies of the 5 mg dose failed to demonstrate effectiveness 1

Special Populations

CYP2D6 poor metabolizers:

• Maximum dose is 10 mg/day (do not exceed) 1

Elderly patients (≥65 years):

• Start at 5 mg/day based on clinical trial data in patients aged 64-88 years 1
• The 5 mg dose demonstrated efficacy in this population with favorable tolerability 1

No dose adjustment needed for:

• Renal impairment 4
• Hepatic impairment 4
• Sex, race, or body size 4

Alternative Slow Titration Strategy

For patients at high risk of nausea (the most common adverse effect), a gradual titration using oral drop solution can be considered 5:

• Start with 1-2 mg/day (1-2 drops)
• Increase by 1-2 mg every few days
• This approach reduced nausea incidence to 9.6% at week 1 (compared to higher rates with standard tablet initiation) while maintaining efficacy 5

Key Clinical Considerations

Tolerability profile:

• Nausea is the most common side effect but typically diminishes over time 6, 7
• Rapid dose escalation to 20 mg does not appear to worsen nausea compared to gradual titration 3
• Long-term treatment (52 weeks) at 15-20 mg showed good tolerability with only 10.7% discontinuation due to adverse events 7

Time to effectiveness:

• Allow 8 weeks minimum for adequate trial at target dose 1
• Some patients show improvement earlier, but full assessment requires this duration 3

Discontinuation:

• Can be stopped abruptly without tapering 1
• However, for doses of 15-20 mg/day, consider reducing to 10 mg/day for one week before full discontinuation 1