Buspirone Dose Titration: 10 mg TID to 15 mg TID
You can increase buspirone from 10 mg three times daily to 15 mg three times daily after 2-3 days, as this is the FDA-recommended titration interval for dose adjustments. 1
FDA-Approved Titration Schedule
The FDA label explicitly states that "at intervals of 2 to 3 days the dosage may be increased 5 mg per day, as needed" 1. Since you're increasing from 30 mg/day total (10 mg TID) to 45 mg/day total (15 mg TID)—a 15 mg/day increase—you can make this adjustment after waiting 2-3 days at the current dose.
Key Dosing Parameters:
- Starting dose: 15 mg/day (7.5 mg BID)
- Titration increment: 5 mg/day increases
- Titration interval: Every 2-3 days
- Maximum daily dose: 60 mg/day
- Common therapeutic range: 20-30 mg/day in divided doses 1
Important Considerations
Food consistency matters: Buspirone bioavailability increases significantly when taken with food. Patients must take it consistently either always with food or always without food to maintain stable plasma levels 1. This is critical during dose adjustments.
Monitor for side effects in the first 24-48 hours: While this guidance comes from SSRI literature, the principle applies to any anxiolytic dose increase—watch for increased anxiety, lightheadedness, dizziness, or nausea, which are the most common buspirone adverse effects 2, 3.
Clinical Context
Research supports that both BID and TID dosing regimens are equally effective, with no significant differences in efficacy or safety profiles 3. Your patient is already on a TID schedule at 30 mg/day total, which is within the commonly employed therapeutic range of 20-30 mg/day 1.
Common pitfall to avoid: Don't wait longer than necessary between dose adjustments. The 2-3 day interval is specifically designed to allow assessment of tolerability while achieving therapeutic effect efficiently. Waiting weeks between small adjustments (as sometimes done with SSRIs) is not indicated for buspirone 1.