This page explains what happens if Allopurinol and Amoxicillin are taken together, according to official sources.
Increased incidence of skin rashes
Taking amoxicillin with allopurinol increases the likelihood of developing a skin rash. Consult your doctor if a rash appears; seek immediate emergency care if the rash spreads or is accompanied by fever, blistering, or facial swelling.
Consult a doctor if a rash appears; seek immediate emergency care if the rash is widespread or accompanied by fever or facial swelling.
Last updated: Sep 25, 2026
Before changing or stopping any medicine, ask your doctor or pharmacist. Never stop your medicine on your own.