Drug interactions
Atenolol + Norepinephrine
Severity: Moderate
Atenolol and Norepinephrine: 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
Atenolol blocks beta-1 receptors and can blunt the cardiac stimulation produced by norepinephrine. Unopposed alpha-adrenergic vasoconstriction may then cause a marked rise in blood pressure with reflex bradycardia.
What this interaction means in plain words
Atenolol and Norepinephrine 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, with unopposed alpha-mediated vasoconstriction.
What to do
Monitor blood pressure and heart rate closely when norepinephrine is infused in a patient taking atenolol, and titrate the dose to effect. Be prepared to treat hypertension or bradycardia and expect a reduced inotropic response.
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
- Amifostine + Atenolol Major
- Amiodarone + Atenolol Major
- Atenolol + Atenolol-chlorthalidone Major
- Atenolol + Betaxolol Major
- Atenolol + Bisoprolol Major
- Atenolol + Carvedilol Major
Frequently asked questions
Can I take Atenolol with Norepinephrine?
MediHelp rates the interaction as moderate. Atenolol and Norepinephrine 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. Atenolol blocks beta-1 receptors and can blunt the cardiac stimulation produced by norepinephrine. Unopposed alpha-adrenergic vasoconstriction may then cause a marked rise in blood pressure with reflex bradycardia.
How serious is the interaction between Atenolol and Norepinephrine?
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 and heart rate closely when norepinephrine is infused in a patient taking atenolol, and titrate the dose to effect. Be prepared to treat hypertension or bradycardia and expect a reduced inotropic response.
What other medicines interact with Atenolol?
MediHelp also lists interactions of Atenolol with, for example, Amifostine, Amiodarone, Atenolol-chlorthalidone. The full list is on the Atenolol page.
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