Drug interactions
Hydrochlorothiazide-losartan + Potassium citrate
Severity: Major
Hydrochlorothiazide-losartan and Potassium citrate: major 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
Losartan reduces aldosterone-mediated potassium excretion, so potassium citrate supplementation can cause hyperkalemia, particularly with renal impairment. The thiazide component partly offsets this by increasing potassium loss, but the net effect is unpredictable.
What this interaction means in plain words
Hydrochlorothiazide-losartan and Potassium citrate can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Hydrochlorothiazide-losartan belongs to Cardiovascular; Potassium citrate belongs to Gastrointestinal Tract.
Why it happens
ARB-induced reduction in renal potassium excretion combined with exogenous potassium load.
What to do
Check serum potassium and creatinine within the first weeks and periodically thereafter. Reduce or stop potassium citrate if potassium rises above the normal range.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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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 citrate
Frequently asked questions
Can I take Hydrochlorothiazide-losartan with Potassium citrate?
MediHelp rates the interaction as major. Hydrochlorothiazide-losartan and Potassium citrate can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Losartan reduces aldosterone-mediated potassium excretion, so potassium citrate supplementation can cause hyperkalemia, particularly with renal impairment. The thiazide component partly offsets this by increasing potassium loss, but the net effect is unpredictable.
How serious is the interaction between Hydrochlorothiazide-losartan and Potassium citrate?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Check serum potassium and creatinine within the first weeks and periodically thereafter. Reduce or stop potassium citrate if potassium rises above the normal range.
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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