Drug interactions
Terbutaline + Torsemide
Severity: Moderate
Terbutaline and Torsemide: 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
Both agents lower serum potassium, so combined use can produce clinically significant hypokalemia, particularly with systemic or high-dose terbutaline. Hypokalemia raises the risk of arrhythmias, especially in patients with cardiac disease or on other QT-prolonging drugs.
What this interaction means in plain words
Terbutaline and Torsemide 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.
Terbutaline belongs to Respiratory; Torsemide belongs to Cardiovascular.
Why it happens
Beta-2 agonism drives potassium into cells while loop diuretics increase renal potassium excretion, giving additive hypokalemia.
What to do
Monitor serum potassium and magnesium, especially at the start of therapy or with dose increases. Replace potassium as needed and consider ECG monitoring in patients with heart 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 Terbutaline
Other interactions of Torsemide
Frequently asked questions
Can I take Terbutaline with Torsemide?
MediHelp rates the interaction as moderate. Terbutaline and Torsemide 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. Both agents lower serum potassium, so combined use can produce clinically significant hypokalemia, particularly with systemic or high-dose terbutaline. Hypokalemia raises the risk of arrhythmias, especially in patients with cardiac disease or on other QT-prolonging drugs.
How serious is the interaction between Terbutaline and Torsemide?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor serum potassium and magnesium, especially at the start of therapy or with dose increases. Replace potassium as needed and consider ECG monitoring in patients with heart disease.
What other medicines interact with Terbutaline?
MediHelp also lists interactions of Terbutaline with, for example, Carvedilol, Droperidol, Fexinidazole. The full list is on the Terbutaline page.
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