Drug interactions
Dobutamine + Timolol
Severity: Moderate
Dobutamine and Timolol: 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
Timolol, a nonselective beta-blocker, antagonizes the beta-adrenergic actions of dobutamine and can reduce its inotropic and chronotropic effect. Unopposed alpha stimulation may produce hypertension and reflex bradycardia. This matters in acute heart failure or stress testing.
What this interaction means in plain words
Dobutamine and Timolol 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.
Dobutamine belongs to Cardiovascular; Timolol belongs to Cardiovascular.
Why it happens
Pharmacodynamic antagonism at beta-adrenergic receptors.
What to do
Monitor blood pressure, heart rate and hemodynamic response, and expect to need higher dobutamine doses. Consider holding the beta-blocker in acute decompensated heart failure if clinically appropriate.
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 Timolol
- Acebutolol + Timolol Major
- Aldesleukin + Timolol Major
- Amifostine + Timolol Major
- Amiodarone + Timolol Major
- Arformoterol + Timolol Major
- Atenolol-chlorthalidone + Timolol Major
Other interactions of Dobutamine
Frequently asked questions
Can I take Dobutamine with Timolol?
MediHelp rates the interaction as moderate. Dobutamine and Timolol 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. Timolol, a nonselective beta-blocker, antagonizes the beta-adrenergic actions of dobutamine and can reduce its inotropic and chronotropic effect. Unopposed alpha stimulation may produce hypertension and reflex bradycardia. This matters in acute heart failure or stress testing.
How serious is the interaction between Dobutamine and Timolol?
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 hemodynamic response, and expect to need higher dobutamine doses. Consider holding the beta-blocker in acute decompensated heart failure if clinically appropriate.
What other medicines interact with Timolol?
MediHelp also lists interactions of Timolol with, for example, Acebutolol, Aldesleukin, Amifostine. The full list is on the Timolol page.
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