Drug interactions
Candesartan + Fosinopril
Severity: Major
Candesartan and Fosinopril: major interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Combining an ACE inhibitor with an angiotensin receptor blocker produces dual renin-angiotensin system blockade. This raises the risk of symptomatic hypotension, hyperkalemia and acute kidney injury. In selected heart failure patients the combination has been used under specialist supervision.
What this interaction means in plain words
Candesartan and Fosinopril can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Candesartan belongs to Cardiovascular; Fosinopril belongs to Cardiovascular.
Why it happens
Additive inhibition of the renin-angiotensin-aldosterone system at two levels reduces glomerular filtration pressure and aldosterone-mediated potassium excretion.
What to do
Avoid in routine practice; if used for heart failure, monitor serum potassium, creatinine and blood pressure closely after initiation and dose changes.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Fosinopril
- Aliskiren + Fosinopril Contraindicated
- Fosinopril + Protein a column Contraindicated
- Fosinopril + Sacubitril / valsartan Contraindicated
- Fosinopril + Sacubitril-valsartan Contraindicated
- Amifostine + Fosinopril Major
- Amiloride + Fosinopril Major
Other interactions of Candesartan
- Aliskiren + Candesartan Contraindicated
- Candesartan + Sparsentan Contraindicated
- Amifostine + Candesartan Major
- Amiloride + Candesartan Major
- Amlodipine-benazepril + Candesartan Major
- Amlodipine-hydrochlorothiazide-valsartan + Candesartan Major
Frequently asked questions
Can I take Candesartan with Fosinopril?
MediHelp rates the interaction as major. Candesartan and Fosinopril can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Combining an ACE inhibitor with an angiotensin receptor blocker produces dual renin-angiotensin system blockade. This raises the risk of symptomatic hypotension, hyperkalemia and acute kidney injury. In selected heart failure patients the combination has been used under specialist supervision.
How serious is the interaction between Candesartan and Fosinopril?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid in routine practice; if used for heart failure, monitor serum potassium, creatinine and blood pressure closely after initiation and dose changes.
What other medicines interact with Fosinopril?
MediHelp also lists interactions of Fosinopril with, for example, Aliskiren, Protein a column, Sacubitril / valsartan. The full list is on the Fosinopril page.
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