Before starting
Heart failure
- Baseline
- Serum creatinine (for creatinine clearance) or Estimated glomerular filtration ratecontraindicated in severe renal impairment or acute renal insufficiency
- Electrolytes
- Serum potassiumcontraindicated if greater than 5.0 mmol/L
After started or dose changed
Heart failure
- After 1 week; then monthly for first 3 months, then every 3 months for one year
- Serum creatinine (for creatinine clearance) or Estimated glomerular filtration rate
- Electrolytes
- Before and after each dose change
- Blood pressure
Ongoing once stable
Heart failure
- Every 6 months
- Serum creatinine (for creatinine clearance) or Estimated glomerular filtration rate
- Electrolytes
Abnormal results
Reduce dose
Reduce the dose and monitor blood biochemistry if any of the following occur:
Potassium
Potassium is greater than 5.5 mmol/L and less than 6 mmol/L
Creatinine
Creatinine is greater than 220 micromol/L and less than 310 micromol/L
Estimated glomerular filtration rate
eGFR is less than 20 to 30mL/min/1.73m2
Stop and seek advice
Stop and seek specialist advice if any of the following occur:
Potassium
Potassium is greater than 6 mmol/L
Creatinine
Creatinine is greater than 310 micromol/L
Estimated glomerular filtration rate
eGFR is less than 20mL/min/1.73m2
Notes
Advice to patients
Advise patients to:
- Avoid NSAIDs unless prescribed
- Avoid salt substitutes containing potassium
- Contact prescriber if diarrhoea, vomiting, or infection with fever and sweating occurs
Bibliography
- British National Formulary (online) London: BMJ Group and Pharmaceutical Press [cited 09/08/2025]
- McDonagh A T, Metra M, Adamo M, et al. 2021 ESC Guidelines for the diagnosis and treatment of acute and chronic heart failure: The Task Force for the diagnosis and treatment of acute and chronic heart failure of the European Society of Cardiology (ESC) Developed with the special contribution of the Heart Failure Association (HFA) of the ESC. European Heart Journal, Volume 42, Issue 36, 21 September 2021, Pages 3599-3726 [cited 09/08/2025]
- National Institute for Health and Care Excellence (NICE). Chronic heart failure in adults: diagnosis and management [NG106]. Sep 2018 [cited 09/08/2025]
- Pfizer Limited. Summary of Product Characteristics – Aldactone 100 mg Film-Coated Tablets. Last revised 30/01/2025 [cited 09/08/2025]
- Scottish Intercollegiate Guidelines Network (SIGN). Management of chronic heart failure (Guideline 147). Annex 5. March 2016 [cited 09/08/2025]
Update history
- Full review and update. Monitoring recommendations for 'Ongoing once stable' in patients with heart failure change to 'Every 6 months' instead of 'Every 3 to 6 months'.
- Published