Drug interactions
Hydrochlorothiazide-irbesartan + Potassium acid
Severity: Moderate
Hydrochlorothiazide-irbesartan and Potassium acid: 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
Potassium acid phosphate supplements add a potassium load to irbesartan, which reduces aldosterone and potassium excretion, creating a risk of hyperkalemia. Hydrochlorothiazide partly offsets this but does not remove the risk, particularly in renal impairment or diabetes.
What this interaction means in plain words
Hydrochlorothiazide-irbesartan and Potassium acid 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.
Why it happens
ARB-induced aldosterone suppression reduces renal potassium excretion, adding to exogenous potassium intake.
What to do
Check serum potassium and renal function at baseline and within the first weeks of combined use. Avoid unnecessary potassium supplementation and reduce the dose if potassium rises.
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 Hydrochlorothiazide-irbesartan
- Aliskiren + Hydrochlorothiazide-irbesartan Contraindicated
- Dofetilide + Hydrochlorothiazide-irbesartan Contraindicated
- Hydrochlorothiazide-irbesartan + Sparsentan Contraindicated
- Aldesleukin + Hydrochlorothiazide-irbesartan Major
- Amifostine + Hydrochlorothiazide-irbesartan Major
- Amiloride + Hydrochlorothiazide-irbesartan Major
Frequently asked questions
Can I take Hydrochlorothiazide-irbesartan with Potassium acid?
MediHelp rates the interaction as moderate. Hydrochlorothiazide-irbesartan and Potassium acid 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. Potassium acid phosphate supplements add a potassium load to irbesartan, which reduces aldosterone and potassium excretion, creating a risk of hyperkalemia. Hydrochlorothiazide partly offsets this but does not remove the risk, particularly in renal impairment or diabetes.
How serious is the interaction between Hydrochlorothiazide-irbesartan and Potassium acid?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Check serum potassium and renal function at baseline and within the first weeks of combined use. Avoid unnecessary potassium supplementation and reduce the dose if potassium rises.
What other medicines interact with Hydrochlorothiazide-irbesartan?
MediHelp also lists interactions of Hydrochlorothiazide-irbesartan with, for example, Aliskiren, Dofetilide, Sparsentan. The full list is on the Hydrochlorothiazide-irbesartan page.
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