Drug interactions
Candesartan + Metolazone
Severity: Moderate
Candesartan and Metolazone: moderate 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
The combination lowers blood pressure additively, and in volume-depleted patients it may cause excessive hypotension and a decline in renal function. The ARB's potassium-retaining effect partly offsets thiazide-induced potassium loss.
What this interaction means in plain words
Candesartan and Metolazone can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Candesartan belongs to Cardiovascular; Metolazone belongs to Cardiovascular.
Why it happens
Additive blood pressure lowering; diuretic volume depletion enhances dependence of glomerular filtration on angiotensin II, which the ARB blocks.
What to do
Monitor blood pressure, serum creatinine, sodium and potassium after initiation or dose changes. Correct volume depletion first or begin with a low ARB dose.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Metolazone
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 Metolazone?
MediHelp rates the interaction as moderate. Candesartan and Metolazone can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. The combination lowers blood pressure additively, and in volume-depleted patients it may cause excessive hypotension and a decline in renal function. The ARB's potassium-retaining effect partly offsets thiazide-induced potassium loss.
How serious is the interaction between Candesartan and Metolazone?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor blood pressure, serum creatinine, sodium and potassium after initiation or dose changes. Correct volume depletion first or begin with a low ARB dose.
What other medicines interact with Metolazone?
MediHelp also lists interactions of Metolazone with, for example, Amifostine, Amlodipine-hydrochlorothiazide-valsartan, Amlodipine-olmesartan-hydrochlorothiazide. The full list is on the Metolazone page.
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