Drug interactions
Hydrochlorothiazide + Valsartan
Severity: Minor
Hydrochlorothiazide and Valsartan: minor 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
This is a common, well-established antihypertensive combination with additive blood pressure lowering. Valsartan tends to offset thiazide-induced potassium loss, though volume depletion can raise the risk of hypotension or renal function decline.
What this interaction means in plain words
Hydrochlorothiazide and Valsartan have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Hydrochlorothiazide belongs to Cardiovascular; Valsartan belongs to Cardiovascular.
Why it happens
Complementary pharmacodynamic effects: thiazide natriuresis activates the renin-angiotensin system, while angiotensin receptor blockade reduces aldosterone-mediated potassium loss.
What to do
Check blood pressure, serum potassium and creatinine after initiation or dose changes. Watch for hypotension in volume-depleted patients.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Hydrochlorothiazide
Other interactions of Valsartan
- Aliskiren + Valsartan Contraindicated
- Sparsentan + Valsartan Contraindicated
- Aldesleukin + Valsartan Major
- Amifostine + Valsartan Major
- Amiloride + Valsartan Major
- Amlodipine-benazepril + Valsartan Major
Frequently asked questions
Can I take Hydrochlorothiazide with Valsartan?
MediHelp rates the interaction as minor. Hydrochlorothiazide and Valsartan have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. This is a common, well-established antihypertensive combination with additive blood pressure lowering. Valsartan tends to offset thiazide-induced potassium loss, though volume depletion can raise the risk of hypotension or renal function decline.
How serious is the interaction between Hydrochlorothiazide and Valsartan?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Check blood pressure, serum potassium and creatinine after initiation or dose changes. Watch for hypotension in volume-depleted patients.
What other medicines interact with Hydrochlorothiazide?
MediHelp also lists interactions of Hydrochlorothiazide with, for example, Dofetilide, Amifostine, Amiodarone. The full list is on the Hydrochlorothiazide page.
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