Management of Proteinuria in Hypertensive Patients

Introduction to Proteinuria Management

The European Society of Cardiology recommends intensifying renin-angiotensin system (RAS) blockade therapy in patients with proteinuria, as it is an independent target requiring aggressive treatment beyond blood pressure control alone 1
RAS blockers (ACE inhibitors or ARBs) are more effective at reducing albuminuria than other antihypertensive agents and are recommended as part of the treatment strategy in hypertensive patients with proteinuria, regardless of current blood pressure control 1

For patients with proteinuria ≥300 mg/g, initiate or uptitrate an ACE inhibitor or ARB to maximum tolerated doses, as these agents provide blood pressure-independent antiproteinuric effects 2
The American College of Cardiology recommends targeting systolic BP to 120-129 mmHg in patients with proteinuria and eGFR >30 mL/min/1.73 m², as lower targets provide additional renoprotection in proteinuric patients 1

Add a thiazide-like diuretic (chlorthalidone or indapamide preferred) to your RAS blocker if proteinuria persists despite maximum-dose RAS blockade 5
For resistant proteinuria despite RAS blocker plus diuretic, add low-dose spironolactone (25-50 mg daily) or eplerenone, with careful potassium monitoring 1, 5

If the patient has diabetes with proteinuria >300 mg/g, add an SGLT2 inhibitor (empagliflozin, canagliflozin, or dapagliflozin) regardless of glycemic control, as these provide additive renoprotection to ARBs 3

Monitor urine protein-to-creatinine ratio to assess treatment response—aim for reduction to <1 g/day or at least 30-50% reduction from baseline 3, 4
Monitor serum creatinine/eGFR—accept up to 30% increase after RAS blocker initiation, but investigate if decline continues 3, 4

Restrict dietary sodium to <2 g/day (<90 mmol/day), as sodium restriction enhances the antiproteinuric effects of RAS blockers 1, 4
Achieve weight normalization through diet and exercise, as obesity independently worsens proteinuria 4

Maximize RAS blocker dose (ACE inhibitor or ARB to maximum tolerated) 1, 2
Add thiazide-like diuretic if proteinuria persists 5
Consider MRA (spironolactone/eplerenone) for resistant proteinuria with careful K+ monitoring 1, 5
Add SGLT2 inhibitor if diabetic with proteinuria >300 mg/g 3
Target BP 120-129 mmHg systolic if eGFR >30 and tolerated 1
Monitor proteinuria, creatinine, and potassium regularly 3, 4