Drug interactions
Cyclopenthiazide + Hydrochlorothiazide-irbesartan
Severity: Moderate
Cyclopenthiazide and Hydrochlorothiazide-irbesartan: 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
Cyclopenthiazide and hydrochlorothiazide are both thiazide diuretics, so combining them duplicates therapy and raises the risk of hypokalemia, hyponatremia and dehydration.
What this interaction means in plain words
Cyclopenthiazide and Hydrochlorothiazide-irbesartan 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.
Why it happens
Additive inhibition of the distal tubular sodium-chloride cotransporter.
What to do
Avoid using two thiazides together; stop one and monitor electrolytes and renal function.
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-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
Frequently asked questions
Can I take Cyclopenthiazide with Hydrochlorothiazide-irbesartan?
MediHelp rates the interaction as moderate. Cyclopenthiazide and Hydrochlorothiazide-irbesartan 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. Cyclopenthiazide and hydrochlorothiazide are both thiazide diuretics, so combining them duplicates therapy and raises the risk of hypokalemia, hyponatremia and dehydration.
How serious is the interaction between Cyclopenthiazide and Hydrochlorothiazide-irbesartan?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid using two thiazides together; stop one and monitor electrolytes and renal function.
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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