Drug interactions
Dobutamine + Penbutolol
Severity: Moderate
Dobutamine and Penbutolol: 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
Penbutolol is a nonselective beta-blocker and blunts the inotropic and chronotropic effects of dobutamine. Unopposed alpha effects may cause raised blood pressure with reflex bradycardia, and the expected hemodynamic response to dobutamine may be lost.
What this interaction means in plain words
Dobutamine and Penbutolol 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
Pharmacodynamic antagonism at beta-adrenergic receptors.
What to do
Monitor blood pressure, heart rate and cardiac output, and expect to need higher dobutamine doses. Consider holding the beta-blocker when inotropic support is essential.
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 Dobutamine
Frequently asked questions
Can I take Dobutamine with Penbutolol?
MediHelp rates the interaction as moderate. Dobutamine and Penbutolol 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. Penbutolol is a nonselective beta-blocker and blunts the inotropic and chronotropic effects of dobutamine. Unopposed alpha effects may cause raised blood pressure with reflex bradycardia, and the expected hemodynamic response to dobutamine may be lost.
How serious is the interaction between Dobutamine and Penbutolol?
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, and expect to need higher dobutamine doses. Consider holding the beta-blocker when inotropic support is essential.
What other medicines interact with Dobutamine?
MediHelp also lists interactions of Dobutamine with, for example, Budesonide-formoterol, Dihydroergotamine intranasal, Dihydroergotamine. The full list is on the Dobutamine page.
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