Atomoxetine 40 mg BID Dosing Schedule
Take atomoxetine 40 mg twice daily with one dose in the morning and the second dose in the late afternoon or early evening. 1
Recommended Timing
According to FDA labeling, when atomoxetine is administered as twice-daily dosing (BID), the total daily dose should be split into evenly divided doses:
- First dose: Morning
- Second dose: Late afternoon/early evening
This applies to your regimen of 40 mg BID (total 80 mg/day) 1.
Key Considerations for Timing
Food Flexibility
- Atomoxetine can be taken with or without food 1
- This gives you flexibility to align doses with your meal schedule or take on an empty stomach based on personal tolerance
Why Split Dosing?
The twice-daily regimen serves specific purposes:
- Reduces adverse effects: BID dosing is specifically recommended "to reduce adverse effects" compared to once-daily dosing 2
- Around-the-clock coverage: Provides continuous symptom control throughout the day and into evening 2
- Better tolerability: Research shows BID dosing was associated with decreased rates of stomachaches compared to once-daily dosing 3
Alternative: Once-Daily Dosing
While you're prescribed BID, it's worth noting that atomoxetine can alternatively be given as a single morning dose if tolerability or adherence becomes an issue 1. Some patients even take it in the evening only if needed 2. However, stick with your prescribed BID regimen unless your physician advises otherwise.
Practical Timing Examples
- Morning dose: 7-8 AM (with or before breakfast)
- Afternoon/evening dose: 4-6 PM (late afternoon or with dinner)
Space the doses approximately 8-12 hours apart for optimal coverage.