This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autacoids, Subject name: Pharmacology
[{'content': 'Allopurinol potentiates the action of: \nSelect and explain. \nA. Coicosteroids, B. Probenecid, C. 6-Mercaptopurine, D. Ampicilin', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Allopurinol: used for chronic gout Reduces uric acid synthesis by competitively inhibiting xanthine oxidase Allopurinola Alloxanthine a noncompetitive inhibitor of xanthine oxidase ESSENTIALS OF MEDICAL PHARMACOLOGY;7TH EDITION;KD TRIPATHI;PAGE NO 216', 'role': 'assistant'}]