Drug interactions
Epinephrine + Isoproterenol
Severity: Major
Epinephrine and Isoproterenol: major interaction.
Last updated Sources: US FDA label
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
Both are adrenergic agonists, and using them together produces additive cardiac stimulation with tachycardia, arrhythmias, and hypokalemia. Blood pressure responses may be unpredictable because of differing alpha and beta effects.
What this interaction means in plain words
Epinephrine and Isoproterenol can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Epinephrine belongs to Endocrine; Isoproterenol belongs to Respiratory.
Why it happens
Additive beta-adrenergic agonism, with epinephrine also stimulating alpha receptors, increasing cardiac stimulation and potassium shift into cells.
What to do
Avoid concurrent use unless clinically necessary; if used, monitor ECG, blood pressure and serum potassium continuously.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Epinephrine and Isoproterenol, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 7 days on the web. No card needed.
References
Other interactions of Isoproterenol
Other interactions of Epinephrine
- Epinephrine + Isocarboxazid Contraindicated
- Epinephrine + Phenelzine Contraindicated
- Epinephrine + Tranylcypromine Contraindicated
- Acebutolol + Epinephrine Major
- Amitriptyline + Epinephrine Major
- Amoxapine + Epinephrine Major
Frequently asked questions
Can I take Epinephrine with Isoproterenol?
MediHelp rates the interaction as major. Epinephrine and Isoproterenol can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Both are adrenergic agonists, and using them together produces additive cardiac stimulation with tachycardia, arrhythmias, and hypokalemia. Blood pressure responses may be unpredictable because of differing alpha and beta effects.
How serious is the interaction between Epinephrine and Isoproterenol?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid concurrent use unless clinically necessary; if used, monitor ECG, blood pressure and serum potassium continuously.
What other medicines interact with Isoproterenol?
MediHelp also lists interactions of Isoproterenol with, for example, Adrenaline-articaine, Bisoprolol, Budesonide-formoterol. The full list is on the Isoproterenol page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
