Erythromycin and Fexofenadine: Drug Interaction Guide
Quick answer: Erythromycin and Fexofenadine have a minor interaction — typically manageable with awareness.
How Erythromycin interacts with Fexofenadine
Erythromycin inhibits intestinal P-glycoprotein and may reduce biliary transport, modestly increasing fexofenadine exposure.
What you should do
No routine dose adjustment is usually needed, but monitor for increased antihistamine adverse effects in susceptible patients.
Key facts
Severity
Minor — typically manageable
Mechanism
Erythromycin inhibits intestinal P-glycoprotein and may reduce biliary transport, modestly increasing fexofenadine expos...
Action
No routine dose adjustment is usually needed, but monitor for increased antihistamine adverse effects in susceptible pat...
Frequently asked questions
Can I take Erythromycin and Fexofenadine together?
Usually yes, with awareness. No routine dose adjustment is usually needed, but monitor for increased antihistamine adverse effects in susceptible patients.
What is the severity of this interaction?
The interaction between Erythromycin and Fexofenadine is classified as Minor — typically manageable. Erythromycin inhibits intestinal P-glycoprotein and may reduce biliary transport, modestly increasing fexofenadine exposure.
What should I do if I'm prescribed both?
No routine dose adjustment is usually needed, but monitor for increased antihistamine adverse effects in susceptible patients. Always consult your prescribing clinician — do not stop or change medications without medical guidance.
Last reviewed: by iMedic Medical Editorial Team. Our editorial process.