Drug interactions
Lisinopril + Losartan
Severity: Major
Lisinopril and Losartan: major interaction.
Last updated Sources: US FDA label
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 without a meaningful outcome benefit in most patients.
What this interaction means in plain words
Lisinopril and Losartan 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.
Lisinopril belongs to Cardiovascular; Losartan 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 the combination in routine practice and use a single RAS blocker. If used in specialist care, monitor serum potassium, creatinine and blood pressure closely.
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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References
Other interactions of Lisinopril
- Aliskiren + Lisinopril Contraindicated
- Lisinopril + Protein a column Contraindicated
- Lisinopril + Sacubitril / valsartan Contraindicated
- Lisinopril + Sacubitril-valsartan Contraindicated
- Amifostine + Lisinopril Major
- Amiloride + Lisinopril Major
Other interactions of Losartan
- Aliskiren + Losartan Contraindicated
- Losartan + Sparsentan Contraindicated
- Amifostine + Losartan Major
- Amiloride + Losartan Major
- Amlodipine-benazepril + Losartan Major
- Amlodipine-hydrochlorothiazide-valsartan + Losartan Major
Frequently asked questions
Can I take Lisinopril with Losartan?
MediHelp rates the interaction as major. Lisinopril and Losartan 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 without a meaningful outcome benefit in most patients.
How serious is the interaction between Lisinopril and Losartan?
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 the combination in routine practice and use a single RAS blocker. If used in specialist care, monitor serum potassium, creatinine and blood pressure closely.
What other medicines interact with Lisinopril?
MediHelp also lists interactions of Lisinopril with, for example, Aliskiren, Protein a column, Sacubitril / valsartan. The full list is on the Lisinopril page.
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