Drug interactions
Isoproterenol + Methyclothiazide
Severity: Moderate
Isoproterenol and Methyclothiazide: 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
Thiazide diuretics waste potassium, and beta-agonists such as isoproterenol drive potassium into cells. Together they can cause clinically significant hypokalemia, which raises the risk of arrhythmia.
What this interaction means in plain words
Isoproterenol and Methyclothiazide 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 hypokalemia from renal potassium loss (thiazide) and beta-2 mediated cellular potassium uptake.
What to do
Check serum potassium and magnesium at baseline and during treatment, and replace as needed. Monitor ECG in patients with cardiac disease.
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 Isoproterenol
Frequently asked questions
Can I take Isoproterenol with Methyclothiazide?
MediHelp rates the interaction as moderate. Isoproterenol and Methyclothiazide 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. Thiazide diuretics waste potassium, and beta-agonists such as isoproterenol drive potassium into cells. Together they can cause clinically significant hypokalemia, which raises the risk of arrhythmia.
How serious is the interaction between Isoproterenol and Methyclothiazide?
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 at baseline and during treatment, and replace as needed. Monitor ECG in patients with cardiac disease.
What other medicines interact with Isoproterenol?
MediHelp also lists interactions of Isoproterenol with, for example, Adrenaline-articaine, Bisoprolol, Budesonide-formoterol. The full list is on the Isoproterenol page.
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