Drug interactions
Hydrochlorothiazide-telmisartan + Potassium chloride
Severity: Moderate
Hydrochlorothiazide-telmisartan and Potassium chloride: 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
Telmisartan lowers renal potassium excretion, so added potassium chloride can lead to hyperkalemia, particularly in patients with kidney disease, diabetes or older age. Hydrochlorothiazide causes potassium loss and may offset this, so the net effect varies between patients.
What this interaction means in plain words
Hydrochlorothiazide-telmisartan and Potassium chloride 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.
Hydrochlorothiazide-telmisartan belongs to Cardiovascular; Potassium chloride belongs to Gastrointestinal Tract.
Why it happens
ARB-mediated reduction in aldosterone-driven potassium excretion adds to an exogenous potassium load, opposed by thiazide kaliuresis.
What to do
Monitor serum potassium and creatinine regularly, especially early in therapy or when doses change. Adjust or stop the potassium supplement according to results.
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
Other interactions of Potassium chloride
Frequently asked questions
Can I take Hydrochlorothiazide-telmisartan with Potassium chloride?
MediHelp rates the interaction as moderate. Hydrochlorothiazide-telmisartan and Potassium chloride 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. Telmisartan lowers renal potassium excretion, so added potassium chloride can lead to hyperkalemia, particularly in patients with kidney disease, diabetes or older age. Hydrochlorothiazide causes potassium loss and may offset this, so the net effect varies between patients.
How serious is the interaction between Hydrochlorothiazide-telmisartan and Potassium chloride?
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 serum potassium and creatinine regularly, especially early in therapy or when doses change. Adjust or stop the potassium supplement according to results.
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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