Drug interactions
Candesartan-hydrochlorothiazide + Losartan
Severity: Major
Candesartan-hydrochlorothiazide and Losartan: 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
Using two ARBs together gives no added benefit and increases the risk of hypotension, hyperkalemia, and renal dysfunction. The thiazide only partly counteracts potassium retention.
What this interaction means in plain words
Candesartan-hydrochlorothiazide 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.
Candesartan-hydrochlorothiazide belongs to Cardiovascular; Losartan belongs to Cardiovascular.
Why it happens
Duplicate AT1 receptor blockade produces additive reduction in aldosterone effect and glomerular filtration pressure.
What to do
Avoid dual ARB therapy and use one agent. If used together, monitor potassium, creatinine, and blood pressure.
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 Candesartan-hydrochlorothiazide
- Aliskiren + Candesartan-hydrochlorothiazide Contraindicated
- Candesartan-hydrochlorothiazide + Dofetilide Contraindicated
- Candesartan-hydrochlorothiazide + Sparsentan Contraindicated
- Acemetacin + Candesartan-hydrochlorothiazide Major
- Amifostine + Candesartan-hydrochlorothiazide Major
- Amiloride + Candesartan-hydrochlorothiazide 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 Candesartan-hydrochlorothiazide with Losartan?
MediHelp rates the interaction as major. Candesartan-hydrochlorothiazide 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. Using two ARBs together gives no added benefit and increases the risk of hypotension, hyperkalemia, and renal dysfunction. The thiazide only partly counteracts potassium retention.
How serious is the interaction between Candesartan-hydrochlorothiazide 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 dual ARB therapy and use one agent. If used together, monitor potassium, creatinine, and blood pressure.
What other medicines interact with Candesartan-hydrochlorothiazide?
MediHelp also lists interactions of Candesartan-hydrochlorothiazide with, for example, Aliskiren, Dofetilide, Sparsentan. The full list is on the Candesartan-hydrochlorothiazide page.
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