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Drug interactions

Amlodipine-hydrochlorothiazide-valsartan + Diflunisal

Severity: Major

Amlodipine-hydrochlorothiazide-valsartan and Diflunisal: 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

Diflunisal, an NSAID, can blunt the blood pressure-lowering effect of valsartan and hydrochlorothiazide. Together with the ARB and diuretic it raises the risk of acute kidney injury and hyperkalemia, especially in older or volume-depleted patients.

What this interaction means in plain words

Amlodipine-hydrochlorothiazide-valsartan and Diflunisal 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.

Amlodipine-hydrochlorothiazide-valsartan belongs to Cardiovascular; Diflunisal belongs to Musculoskeletal.

Evidence level: High

Why it happens

Prostaglandin synthesis inhibition causes sodium retention and reduced renal perfusion, compounding the renal effects of ARB and diuretic therapy.

What to do

Avoid combined use when possible and choose paracetamol for analgesia. If an NSAID is needed, use the lowest dose for the shortest time and monitor blood pressure, creatinine and potassium.

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?

Bring a full list of your medicines, including over-the-counter products, supplements and herbal remedies, to every pharmacy visit.

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Frequently asked questions

Can I take Amlodipine-hydrochlorothiazide-valsartan with Diflunisal?

MediHelp rates the interaction as major. Amlodipine-hydrochlorothiazide-valsartan and Diflunisal 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. Diflunisal, an NSAID, can blunt the blood pressure-lowering effect of valsartan and hydrochlorothiazide. Together with the ARB and diuretic it raises the risk of acute kidney injury and hyperkalemia, especially in older or volume-depleted patients.

How serious is the interaction between Amlodipine-hydrochlorothiazide-valsartan and Diflunisal?

MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid combined use when possible and choose paracetamol for analgesia. If an NSAID is needed, use the lowest dose for the shortest time and monitor blood pressure, creatinine and potassium.

What other medicines interact with Amlodipine-hydrochlorothiazide-valsartan?

MediHelp also lists interactions of Amlodipine-hydrochlorothiazide-valsartan with, for example, Aliskiren, Dofetilide, Sparsentan. The full list is on the Amlodipine-hydrochlorothiazide-valsartan page.

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