Drug interactions
Carvedilol + Dobutamine
Severity: Moderate
Carvedilol and Dobutamine: 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
Carvedilol blocks beta-adrenergic receptors and can blunt the inotropic and chronotropic response to dobutamine. Because carvedilol also blocks alpha-1 receptors, vasodilation may become unopposed and hypotension can occur. Haemodynamic support may be less effective in patients on a beta-blocker.
What this interaction means in plain words
Carvedilol and Dobutamine 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.
Carvedilol belongs to Cardiovascular; Dobutamine belongs to Cardiovascular.
Why it happens
Pharmacodynamic antagonism between a nonselective beta/alpha-1 blocker and a beta-1 agonist.
What to do
Monitor blood pressure, heart rate and cardiac output during dobutamine infusion and titrate the dobutamine dose to response. Higher doses may be needed in patients on carvedilol, and the beta-blocker may need to be held in acute decompensation.
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 Carvedilol
Other interactions of Dobutamine
Frequently asked questions
Can I take Carvedilol with Dobutamine?
MediHelp rates the interaction as moderate. Carvedilol and Dobutamine 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. Carvedilol blocks beta-adrenergic receptors and can blunt the inotropic and chronotropic response to dobutamine. Because carvedilol also blocks alpha-1 receptors, vasodilation may become unopposed and hypotension can occur. Haemodynamic support may be less effective in patients on a beta-blocker.
How serious is the interaction between Carvedilol and Dobutamine?
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 blood pressure, heart rate and cardiac output during dobutamine infusion and titrate the dobutamine dose to response. Higher doses may be needed in patients on carvedilol, and the beta-blocker may need to be held in acute decompensation.
What other medicines interact with Carvedilol?
MediHelp also lists interactions of Carvedilol with, for example, Amifostine, Amiodarone, Arformoterol. The full list is on the Carvedilol page.
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