Can I take other medicines alongside allopurinol? Allopurinol can lower the urate levels in your blood over the space of a few weeks. This will diclofenac sodium (die-clo-fe-nac sow-dee-um); diclofenac potassium (die-clo-fe-nac po-tass-ee-um); etoricoxib There;s no known interaction between...