allopurinol use

What Should You Not Take With Allopurinol? azathioprine. benazepril. captopril. didanosine. dyphylline. enalapril. perindopril. protamine. What are the side effects of allopurinol for gout? Stomach upset, nausea, diarrhea, or drowsiness may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly. Which vitamin is restricted for a patient on allopurinol?