Drug interactions
Hydrochlorothiazide-losartan + Potassium chloride
Severity: Moderate
Hydrochlorothiazide-losartan 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
Potassium chloride with losartan can cause hyperkalemia because the ARB reduces renal potassium excretion. The thiazide component offsets this partly, so the net effect varies and is greater with renal impairment or diabetes.
What this interaction means in plain words
Hydrochlorothiazide-losartan 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-losartan belongs to Cardiovascular; Potassium chloride belongs to Gastrointestinal Tract.
Why it happens
Potassium load combined with ARB-induced reduction in aldosterone-mediated potassium excretion, partly offset by thiazide kaliuresis.
What to do
Monitor serum potassium and creatinine at the start and periodically, and reduce or stop the 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-losartan
- Aliskiren + Hydrochlorothiazide-losartan Contraindicated
- Dofetilide + Hydrochlorothiazide-losartan Contraindicated
- Hydrochlorothiazide-losartan + Sparsentan Contraindicated
- Aceclofenac + Hydrochlorothiazide-losartan Major
- Aldesleukin + Hydrochlorothiazide-losartan Major
- Amifostine + Hydrochlorothiazide-losartan Major
Other interactions of Potassium chloride
Frequently asked questions
Can I take Hydrochlorothiazide-losartan with Potassium chloride?
MediHelp rates the interaction as moderate. Hydrochlorothiazide-losartan 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. Potassium chloride with losartan can cause hyperkalemia because the ARB reduces renal potassium excretion. The thiazide component offsets this partly, so the net effect varies and is greater with renal impairment or diabetes.
How serious is the interaction between Hydrochlorothiazide-losartan 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 at the start and periodically, and reduce or stop the supplement if potassium rises.
What other medicines interact with Hydrochlorothiazide-losartan?
MediHelp also lists interactions of Hydrochlorothiazide-losartan with, for example, Aliskiren, Dofetilide, Sparsentan. The full list is on the Hydrochlorothiazide-losartan page.
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