Drug interactions
Amlodipine-olmesartan-hydrochlorothiazide + Potassium acid
Severity: Major
Amlodipine-olmesartan-hydrochlorothiazide and Potassium acid: major interaction.
Last updated Sources: UK SmPC
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 phosphate supplements raise serum potassium, and olmesartan reduces aldosterone-mediated potassium excretion, so hyperkalemia can develop. Hydrochlorothiazide offsets this partially but unpredictably.
What this interaction means in plain words
Amlodipine-olmesartan-hydrochlorothiazide and Potassium acid 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.
Why it happens
Added potassium load with reduced renal potassium excretion from angiotensin receptor blockade.
What to do
Check serum potassium and renal function before and soon after starting, then regularly. Avoid supplementation unless hypokalemia is documented.
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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References
- Sterile Potassium Acid Phosphate Solution - SmPC sections 4.3/4.5 (class statement: Diuretics or Thiazides; "Interaction with Diuretics or Thiazides") — electronic medicines compendium (UK SmPC)
Other interactions of Amlodipine-olmesartan-hydrochlorothiazide
- Aliskiren + Amlodipine-olmesartan-hydrochlorothiazide Contraindicated
- Amlodipine-olmesartan-hydrochlorothiazide + Dofetilide Contraindicated
- Amlodipine-olmesartan-hydrochlorothiazide + Sparsentan Contraindicated
- Acemetacin + Amlodipine-olmesartan-hydrochlorothiazide Major
- Aldesleukin + Amlodipine-olmesartan-hydrochlorothiazide Major
- Amifostine + Amlodipine-olmesartan-hydrochlorothiazide Major
Frequently asked questions
Can I take Amlodipine-olmesartan-hydrochlorothiazide with Potassium acid?
MediHelp rates the interaction as major. Amlodipine-olmesartan-hydrochlorothiazide and Potassium acid 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. Potassium phosphate supplements raise serum potassium, and olmesartan reduces aldosterone-mediated potassium excretion, so hyperkalemia can develop. Hydrochlorothiazide offsets this partially but unpredictably.
How serious is the interaction between Amlodipine-olmesartan-hydrochlorothiazide and Potassium acid?
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 renal function before and soon after starting, then regularly. Avoid supplementation unless hypokalemia is documented.
What other medicines interact with Amlodipine-olmesartan-hydrochlorothiazide?
MediHelp also lists interactions of Amlodipine-olmesartan-hydrochlorothiazide with, for example, Aliskiren, Dofetilide, Sparsentan. The full list is on the Amlodipine-olmesartan-hydrochlorothiazide page.
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