Drug interactions
Candesartan + Hydrochlorothiazide-olmesartan
Severity: Major
Candesartan and Hydrochlorothiazide-olmesartan: 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 angiotensin receptor blockers together provides no proven additional benefit and increases the risk of hypotension, hyperkalemia and renal dysfunction. It also duplicates the olmesartan component.
What this interaction means in plain words
Candesartan and Hydrochlorothiazide-olmesartan 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-olmesartan belongs to Cardiovascular.
Why it happens
Duplicate AT1 receptor blockade causes additive reductions in aldosterone effect and glomerular filtration pressure.
What to do
Avoid combining two ARBs and use only one agent from this class. If already combined, monitor potassium, creatinine and blood pressure closely and stop one agent.
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 Hydrochlorothiazide-olmesartan
- Aliskiren + Hydrochlorothiazide-olmesartan Contraindicated
- Dofetilide + Hydrochlorothiazide-olmesartan Contraindicated
- Hydrochlorothiazide-olmesartan + Sparsentan Contraindicated
- Acemetacin + Hydrochlorothiazide-olmesartan Major
- Amifostine + Hydrochlorothiazide-olmesartan Major
- Amiloride + Hydrochlorothiazide-olmesartan 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-olmesartan?
MediHelp rates the interaction as major. Candesartan and Hydrochlorothiazide-olmesartan 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 proven additional benefit and increases the risk of hypotension, hyperkalemia and renal dysfunction. It also duplicates the olmesartan component.
How serious is the interaction between Candesartan and Hydrochlorothiazide-olmesartan?
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 from this class. If already combined, monitor potassium, creatinine and blood pressure closely and stop one agent.
What other medicines interact with Hydrochlorothiazide-olmesartan?
MediHelp also lists interactions of Hydrochlorothiazide-olmesartan with, for example, Aliskiren, Dofetilide, Sparsentan. The full list is on the Hydrochlorothiazide-olmesartan page.
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