Week-by-Week Captopril Titration Schedule
Start captopril at 6.25-12.5 mg three times daily, then titrate to 25 mg three times daily over the first week, advancing to 50 mg three times daily by weeks 2-4, with the target maintenance dose of 50 mg three times daily reached within several weeks as tolerated. 1
Initial Dosing (Week 1)
For heart failure or post-MI patients:
- Day 1: Single test dose of 6.25 mg 1
- Days 2-7: 12.5 mg three times daily 2, 1
- Monitor blood pressure, renal function, and potassium at 5-7 days 3
For hypertension without volume depletion:
Week 2-3 Titration
- Increase to 25 mg three times daily if starting from lower dose 1
- Recheck potassium and creatinine every 5-7 days during titration 3
- For hypertension: may advance to 50 mg twice or three times daily if blood pressure not controlled 2
Week 4 and Beyond
- Target dose: 50 mg three times daily (150 mg total daily) 2, 4, 1
- After reaching 50 mg three times daily, delay further increases for at least 2 weeks to assess response 1
- Maximum dose: 50 mg three times daily for most indications; up to 150 mg three times daily for severe hypertension (not to exceed 450 mg daily) 2, 1
Critical Monitoring Points
Check at each titration step:
- Blood pressure (avoid if systolic <90 mmHg) 2
- Serum creatinine (stop if increases >30% from baseline) 5
- Serum potassium (avoid starting if >5.0 mEq/L) 6
- Monitor 1-2 weeks after each dose increment 7, 5
Special Populations
Renal impairment: Use slower titration with 1-2 week intervals between increases; may require lower maintenance doses 1
Volume depleted patients: Start with 6.25 mg three times daily to minimize hypotension risk 2, 1
Post-MI with LV dysfunction: The evidence-based target from major trials (SAVE) was 50 mg three times daily (127 mg mean daily dose achieved) 3, 4
Common Pitfall
The most critical error is advancing doses too rapidly without adequate monitoring of renal function and potassium, particularly when combining with other RAAS inhibitors or in patients with baseline renal impairment. Always recheck labs 5-7 days after each dose change until stable 3.