Memantine Dose Titration: 5mg to 10mg
Increase memantine from 5mg once daily to 10mg daily (5mg twice daily) after a minimum of one week. 11
Standard Titration Schedule
The FDA-approved dosing protocol is clear and unambiguous:
- Week 1: Start at 5mg once daily
- Week 2: Increase to 10mg daily (5mg twice daily)
- Week 3: Increase to 15mg daily (5mg and 10mg as separate doses)
- Week 4: Target dose of 20mg daily (10mg twice daily)
The minimum interval between any dose increase is one week 11. This applies specifically to the transition from 5mg to 10mg daily dosing.
Key Clinical Considerations
Dosing Administration
- The 10mg daily dose should be split into 5mg twice daily, not given as a single 10mg dose 11
- Memantine can be taken with or without food 11
- If doses are missed for several days, you may need to restart at lower doses and retitrate 1
Tolerability Evidence
Research demonstrates that this one-week titration interval is well-tolerated. In a 28-week extension study, completion rates during dose titration exceeded 90%, and only 6.7% of patients discontinued due to adverse events 2. The gradual weekly escalation minimizes side effects like dizziness (6.1% vs 3.9% placebo) and headache (5.5% vs 4.3% placebo) 3.
Special Populations Requiring Slower Titration
Do not accelerate the one-week interval. In patients with severe renal impairment (creatinine clearance 5-29 mL/min), the target dose should be reduced to 5mg twice daily (10mg total), but the weekly titration schedule remains unchanged 11.
Common Pitfall to Avoid
Never skip the one-week waiting period between dose increases, even if the patient tolerates the initial 5mg dose well. The FDA labeling explicitly states this minimum interval is required for safe titration 11. Faster escalation increases the risk of adverse events, particularly confusion, dizziness, and falls—outcomes that directly impact morbidity and quality of life in this vulnerable population.