Spironolactone (Aldactone)

Cardiology / Nephrology (Potassium-Sparing Diuretic)

Dosing & Administration

Adult Dose

12.5-25 mg PO daily for HF. 100-200 mg for Ascites.

Pediatric Dose

1-3 mg/kg/day PO divided.

Renal Adjustment

eGFR < 30: Contraindicated (hyperkalemia risk).

Hepatic Adjustment

No adjustment necessary (used heavily in cirrhosis).

Safety & Special Populations

Pregnancy Category

C

Lactation Safety

Compatible.

Contraindications & Adverse Effects

Contraindications

  • Anuria
  • Severe renal impairment
  • Hyperkalemia

Common Adverse Effects

  • Hyperkalemia
  • Gynecomastia
  • Menstrual irregularities