Drug interactions
Losartan + Telmisartan-amlodipine
Severity: Major
Losartan and Telmisartan-amlodipine: 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
Using two angiotensin receptor blockers together provides no meaningful added benefit and increases the risk of hypotension, hyperkalemia, and acute kidney injury. Dual renin-angiotensin system blockade is discouraged in clinical guidelines.
What this interaction means in plain words
Losartan and Telmisartan-amlodipine 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.
Losartan belongs to Cardiovascular; Telmisartan-amlodipine belongs to Cardiovascular.
Why it happens
Duplicate blockade of the angiotensin II type 1 receptor leads to additive reduction in aldosterone and glomerular filtration pressure.
What to do
Avoid combining two ARBs and use only one agent, titrating to effect. If dual therapy has been given, monitor 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 Telmisartan-amlodipine
- Aliskiren + Telmisartan-amlodipine Contraindicated
- Sparsentan + Telmisartan-amlodipine Contraindicated
- Amifostine + Telmisartan-amlodipine Major
- Amiloride + Telmisartan-amlodipine Major
- Benazepril + Telmisartan-amlodipine Major
- Candesartan + Telmisartan-amlodipine 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 Losartan with Telmisartan-amlodipine?
MediHelp rates the interaction as major. Losartan and Telmisartan-amlodipine 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. Using two angiotensin receptor blockers together provides no meaningful added benefit and increases the risk of hypotension, hyperkalemia, and acute kidney injury. Dual renin-angiotensin system blockade is discouraged in clinical guidelines.
How serious is the interaction between Losartan and Telmisartan-amlodipine?
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 combining two ARBs and use only one agent, titrating to effect. If dual therapy has been given, monitor potassium, creatinine and blood pressure closely.
What other medicines interact with Telmisartan-amlodipine?
MediHelp also lists interactions of Telmisartan-amlodipine with, for example, Aliskiren, Sparsentan, Amifostine. The full list is on the Telmisartan-amlodipine page.
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