Drug interactions
Candesartan-hydrochlorothiazide + Isoproterenol
Severity: Moderate
Candesartan-hydrochlorothiazide and Isoproterenol: 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
Hydrochlorothiazide lowers serum potassium, and isoproterenol shifts potassium into cells through beta-2 stimulation. Together they can cause marked hypokalemia, which raises the risk of arrhythmia, especially because isoproterenol is itself arrhythmogenic.
What this interaction means in plain words
Candesartan-hydrochlorothiazide and Isoproterenol 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.
Candesartan-hydrochlorothiazide belongs to Cardiovascular; Isoproterenol belongs to Respiratory.
Why it happens
Additive hypokalemia from renal potassium loss (thiazide) and beta-2 mediated intracellular potassium shift (isoproterenol).
What to do
Check serum potassium and magnesium before and during isoproterenol therapy in patients taking the thiazide. Replace potassium as needed and monitor the ECG.
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 Candesartan-hydrochlorothiazide
- Aliskiren + Candesartan-hydrochlorothiazide Contraindicated
- Candesartan-hydrochlorothiazide + Dofetilide Contraindicated
- Candesartan-hydrochlorothiazide + Sparsentan Contraindicated
- Acemetacin + Candesartan-hydrochlorothiazide Major
- Amifostine + Candesartan-hydrochlorothiazide Major
- Amiloride + Candesartan-hydrochlorothiazide Major
Other interactions of Isoproterenol
Frequently asked questions
Can I take Candesartan-hydrochlorothiazide with Isoproterenol?
MediHelp rates the interaction as moderate. Candesartan-hydrochlorothiazide and Isoproterenol 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. Hydrochlorothiazide lowers serum potassium, and isoproterenol shifts potassium into cells through beta-2 stimulation. Together they can cause marked hypokalemia, which raises the risk of arrhythmia, especially because isoproterenol is itself arrhythmogenic.
How serious is the interaction between Candesartan-hydrochlorothiazide and Isoproterenol?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Check serum potassium and magnesium before and during isoproterenol therapy in patients taking the thiazide. Replace potassium as needed and monitor the ECG.
What other medicines interact with Candesartan-hydrochlorothiazide?
MediHelp also lists interactions of Candesartan-hydrochlorothiazide with, for example, Aliskiren, Dofetilide, Sparsentan. The full list is on the Candesartan-hydrochlorothiazide page.
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