Allopurinol and Amoxicillin: Drug Interaction Guide
Quick answer: Allopurinol and Amoxicillin have a minor interaction — typically manageable with awareness.
How Allopurinol interacts with Amoxicillin
The combination increases the incidence of non-allergic morbilliform rash by an uncertain immunological mechanism, particularly with concurrent hyperuricemia.
What you should do
Be aware of the increased rash risk; the combination is not contraindicated but consider alternative antibiotics where clinically appropriate.
Key facts
Severity
Minor — typically manageable
Mechanism
The combination increases the incidence of non-allergic morbilliform rash by an uncertain immunological mechanism, parti...
Action
Be aware of the increased rash risk; the combination is not contraindicated but consider alternative antibiotics where c...
Frequently asked questions
Can I take Allopurinol and Amoxicillin together?
Usually yes, with awareness. Be aware of the increased rash risk; the combination is not contraindicated but consider alternative antibiotics where clinically appropriate.
What is the severity of this interaction?
The interaction between Allopurinol and Amoxicillin is classified as Minor — typically manageable. The combination increases the incidence of non-allergic morbilliform rash by an uncertain immunological mechanism, particularly with concurrent hyperuricemia.
What should I do if I'm prescribed both?
Be aware of the increased rash risk; the combination is not contraindicated but consider alternative antibiotics where clinically appropriate. Always consult your prescribing clinician — do not stop or change medications without medical guidance.
Last reviewed: by iMedic Medical Editorial Team. Our editorial process.