Resistant Hypertension Management with Spironolactone

Patient Selection and Current Medication

• The American Heart Association recommends spironolactone as an appropriate addition for a 73-year-old patient with uncontrolled hypertension despite maximum valsartan dose and metoprolol, following the recommended step-wise approach for resistant hypertension 1, 2
• Patients on maximum valsartan dose and metoprolol, with previous trials of amlodipine and hydrochlorothiazide being unsuccessful, may benefit from spironolactone addition 1

Treatment Algorithm

• The treatment algorithm for resistant hypertension involves a step-wise approach, with spironolactone being the recommended fourth agent after ARB/ACEI, beta-blocker, and thiazide/thiazide-like diuretic 1, 2, 3

Spironolactone Dosing and Monitoring

• The starting dose of spironolactone for a 73-year-old patient is 12.5-25 mg daily, with potential titration to 50 mg if needed and tolerated 4
• Potassium monitoring is crucial, with checks at 3 days and 1 week after initiating therapy, then monthly for the first 3 months 4
• Renal function should be closely monitored, especially in elderly patients, with estimated creatinine clearance being >30 mL/min for spironolactone initiation 4

Safety Considerations

• Elderly patients, such as the 73-year-old patient, have a higher risk of adverse effects, particularly hyperkalemia, when taking spironolactone 4
• The combination of maximum-dose valsartan with spironolactone increases hyperkalemia risk, and patients should be monitored accordingly 4

Precautions and Contraindications

• Patients taking spironolactone should discontinue or reduce any potassium supplements, address any dehydration promptly, and avoid NSAIDs and COX-2 inhibitors to minimize hyperkalemia risk 4