Carbamazepine and Erythromycin: Drug Interaction Guide
Quick answer: This is a major interaction — avoid combining Carbamazepine and Erythromycin unless specifically directed by your doctor.
How Carbamazepine interacts with Erythromycin
Erythromycin is a potent CYP3A4 inhibitor that markedly reduces carbamazepine clearance, raising plasma levels and risk of neurotoxicity (ataxia, diplopia, confusion).
What you should do
Avoid concurrent use; if unavoidable, reduce carbamazepine dose and monitor serum levels and clinical signs of toxicity.
Key facts
Severity
Major — avoid combination
Mechanism
Erythromycin is a potent CYP3A4 inhibitor that markedly reduces carbamazepine clearance, raising plasma levels and risk ...
Action
Avoid concurrent use; if unavoidable, reduce carbamazepine dose and monitor serum levels and clinical signs of toxicity.
Frequently asked questions
Can I take Carbamazepine and Erythromycin together?
No — this combination should generally be avoided. Avoid concurrent use; if unavoidable, reduce carbamazepine dose and monitor serum levels and clinical signs of toxicity.
What is the severity of this interaction?
The interaction between Carbamazepine and Erythromycin is classified as Major — avoid combination. Erythromycin is a potent CYP3A4 inhibitor that markedly reduces carbamazepine clearance, raising plasma levels and risk of neurotoxicity (ataxia, diplopia, confusion).
What should I do if I'm prescribed both?
Avoid concurrent use; if unavoidable, reduce carbamazepine dose and monitor serum levels and clinical signs of toxicity. Always consult your prescribing clinician — do not stop or change medications without medical guidance.
Last reviewed: by iMedic Medical Editorial Team. Our editorial process.