Drug interactions
Candesartan + Hydrochlorothiazide-valsartan
Severity: Major
Candesartan and Hydrochlorothiazide-valsartan: 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 two angiotensin receptor blockers gives dual blockade of the same system with no clear benefit and a higher risk of hypotension, hyperkalemia and renal impairment. The thiazide offsets potassium retention only partly.
What this interaction means in plain words
Candesartan and Hydrochlorothiazide-valsartan 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; Hydrochlorothiazide-valsartan belongs to Cardiovascular.
Why it happens
Duplicate angiotensin II type 1 receptor blockade producing additive hypotension, hyperkalemia and reduced glomerular filtration.
What to do
Avoid using two ARBs together and keep to a single agent. If the combination has been given, check potassium, creatinine and blood pressure and discontinue one drug.
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 Hydrochlorothiazide-valsartan
- Aliskiren + Hydrochlorothiazide-valsartan Contraindicated
- Dofetilide + Hydrochlorothiazide-valsartan Contraindicated
- Hydrochlorothiazide-valsartan + Sparsentan Contraindicated
- Aldesleukin + Hydrochlorothiazide-valsartan Major
- Amifostine + Hydrochlorothiazide-valsartan Major
- Amiloride + Hydrochlorothiazide-valsartan 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 Hydrochlorothiazide-valsartan?
MediHelp rates the interaction as major. Candesartan and Hydrochlorothiazide-valsartan 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 two angiotensin receptor blockers gives dual blockade of the same system with no clear benefit and a higher risk of hypotension, hyperkalemia and renal impairment. The thiazide offsets potassium retention only partly.
How serious is the interaction between Candesartan and Hydrochlorothiazide-valsartan?
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 using two ARBs together and keep to a single agent. If the combination has been given, check potassium, creatinine and blood pressure and discontinue one drug.
What other medicines interact with Hydrochlorothiazide-valsartan?
MediHelp also lists interactions of Hydrochlorothiazide-valsartan with, for example, Aliskiren, Dofetilide, Sparsentan. The full list is on the Hydrochlorothiazide-valsartan page.
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