Drug interactions
Atenolol-chlorthalidone + Imaging agents
Severity: Moderate
Atenolol-chlorthalidone and Imaging agents: 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 and treatment-resistant reactions to iodinated contrast media, because beta-blockade blunts the response to epinephrine. The generic entry does not specify the agent, and the concern is mainly for iodinated contrast.
What this interaction means in plain words
Atenolol-chlorthalidone and Imaging agents 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 effects of epinephrine used to treat anaphylactoid reactions.
What to do
Ensure resuscitation equipment is available and be prepared to use glucagon for reactions refractory to epinephrine in patients on beta-blockers. Do not stop the beta-blocker routinely.
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 Atenolol-chlorthalidone
Frequently asked questions
Can I take Atenolol-chlorthalidone with Imaging agents?
MediHelp rates the interaction as moderate. Atenolol-chlorthalidone and Imaging agents 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 and treatment-resistant reactions to iodinated contrast media, because beta-blockade blunts the response to epinephrine. The generic entry does not specify the agent, and the concern is mainly for iodinated contrast.
How serious is the interaction between Atenolol-chlorthalidone and Imaging agents?
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 be prepared to use glucagon for reactions refractory to epinephrine in patients on beta-blockers. Do not stop the beta-blocker routinely.
What other medicines interact with Atenolol-chlorthalidone?
MediHelp also lists interactions of Atenolol-chlorthalidone with, for example, Acebutolol, Aldesleukin, Amiodarone. The full list is on the Atenolol-chlorthalidone page.
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