Drug interactions
Imaging agents + Labetalol
Severity: Moderate
Imaging agents and Labetalol: 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
Patients on beta blockers may have more severe or treatment-resistant reactions if they develop anaphylaxis to iodinated or other contrast media. Beta blockade can blunt the response to epinephrine and mask compensatory tachycardia.
What this interaction means in plain words
Imaging agents and Labetalol 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
Beta blockade antagonizes the response to epinephrine and the compensatory cardiovascular response during anaphylaxis.
What to do
Ensure resuscitation equipment is available and that staff know glucagon can be used for epinephrine-resistant reactions. Do not routinely stop labetalol, but weigh risk in patients with prior contrast reactions.
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 Labetalol
- Amifostine + Labetalol Major
- Amiodarone + Labetalol Major
- Atenolol-chlorthalidone + Labetalol Major
- Atenolol + Labetalol Major
- Betaxolol + Labetalol Major
- Bisoprolol + Labetalol Major
Frequently asked questions
Can I take Imaging agents with Labetalol?
MediHelp rates the interaction as moderate. Imaging agents and Labetalol 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. Patients on beta blockers may have more severe or treatment-resistant reactions if they develop anaphylaxis to iodinated or other contrast media. Beta blockade can blunt the response to epinephrine and mask compensatory tachycardia.
How serious is the interaction between Imaging agents and Labetalol?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Ensure resuscitation equipment is available and that staff know glucagon can be used for epinephrine-resistant reactions. Do not routinely stop labetalol, but weigh risk in patients with prior contrast reactions.
What other medicines interact with Labetalol?
MediHelp also lists interactions of Labetalol with, for example, Amifostine, Amiodarone, Atenolol-chlorthalidone. The full list is on the Labetalol page.
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