Drug interactions
Hydrochlorothiazide-telmisartan + Potassium acid
Severity: Moderate
Hydrochlorothiazide-telmisartan 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 supplies potassium, and telmisartan reduces renal potassium excretion by blocking aldosterone-mediated effects, so hyperkalemia can develop, especially in renal impairment or diabetes. Hydrochlorothiazide promotes potassium loss and may partly offset the effect, which makes the net outcome unpredictable.
What this interaction means in plain words
Hydrochlorothiazide-telmisartan 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
Potassium load combined with ARB-induced reduced aldosterone-dependent potassium excretion, partly counterbalanced by thiazide kaliuresis.
What to do
Measure serum potassium and renal function at baseline and within the first weeks of therapy, then periodically. Reduce or stop the potassium supplement 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-telmisartan
- Aliskiren + Hydrochlorothiazide-telmisartan Contraindicated
- Dofetilide + Hydrochlorothiazide-telmisartan Contraindicated
- Hydrochlorothiazide-telmisartan + Sparsentan Contraindicated
- Aldesleukin + Hydrochlorothiazide-telmisartan Major
- Amifostine + Hydrochlorothiazide-telmisartan Major
- Amiloride + Hydrochlorothiazide-telmisartan Major
Frequently asked questions
Can I take Hydrochlorothiazide-telmisartan with Potassium acid?
MediHelp rates the interaction as moderate. Hydrochlorothiazide-telmisartan 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 supplies potassium, and telmisartan reduces renal potassium excretion by blocking aldosterone-mediated effects, so hyperkalemia can develop, especially in renal impairment or diabetes. Hydrochlorothiazide promotes potassium loss and may partly offset the effect, which makes the net outcome unpredictable.
How serious is the interaction between Hydrochlorothiazide-telmisartan 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: Measure serum potassium and renal function at baseline and within the first weeks of therapy, then periodically. Reduce or stop the potassium supplement if potassium rises.
What other medicines interact with Hydrochlorothiazide-telmisartan?
MediHelp also lists interactions of Hydrochlorothiazide-telmisartan with, for example, Aliskiren, Dofetilide, Sparsentan. The full list is on the Hydrochlorothiazide-telmisartan page.
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