Drug interactions
Hydrochlorothiazide-irbesartan + Trandolapril
Severity: Major
Hydrochlorothiazide-irbesartan and Trandolapril: 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
Combining an ACE inhibitor with an angiotensin receptor blocker produces dual renin-angiotensin system blockade. This raises the risk of hypotension, hyperkalemia and renal impairment without a clear gain in outcomes.
What this interaction means in plain words
Hydrochlorothiazide-irbesartan and Trandolapril 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-irbesartan belongs to Cardiovascular; Trandolapril belongs to Cardiovascular.
Why it happens
Additive pharmacodynamic inhibition of the renin-angiotensin-aldosterone system at two points.
What to do
Avoid the combination and use a single RAS blocker. If it is used under specialist direction, monitor potassium, creatinine and blood pressure closely.
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-irbesartan
- Aliskiren + Hydrochlorothiazide-irbesartan Contraindicated
- Dofetilide + Hydrochlorothiazide-irbesartan Contraindicated
- Hydrochlorothiazide-irbesartan + Sparsentan Contraindicated
- Aldesleukin + Hydrochlorothiazide-irbesartan Major
- Amifostine + Hydrochlorothiazide-irbesartan Major
- Amiloride + Hydrochlorothiazide-irbesartan Major
Other interactions of Trandolapril
- Aliskiren + Trandolapril Contraindicated
- Protein a column + Trandolapril Contraindicated
- Sacubitril / valsartan + Trandolapril Contraindicated
- Sacubitril-valsartan + Trandolapril Contraindicated
- Aldesleukin + Trandolapril Major
- Amifostine + Trandolapril Major
Frequently asked questions
Can I take Hydrochlorothiazide-irbesartan with Trandolapril?
MediHelp rates the interaction as major. Hydrochlorothiazide-irbesartan and Trandolapril 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. Combining an ACE inhibitor with an angiotensin receptor blocker produces dual renin-angiotensin system blockade. This raises the risk of hypotension, hyperkalemia and renal impairment without a clear gain in outcomes.
How serious is the interaction between Hydrochlorothiazide-irbesartan and Trandolapril?
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 the combination and use a single RAS blocker. If it is used under specialist direction, monitor potassium, creatinine and blood pressure closely.
What other medicines interact with Hydrochlorothiazide-irbesartan?
MediHelp also lists interactions of Hydrochlorothiazide-irbesartan with, for example, Aliskiren, Dofetilide, Sparsentan. The full list is on the Hydrochlorothiazide-irbesartan page.
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