Hi, Ugur, we have done a population-based matched-cohort study to test if allopurinol use is associated with beneficial cardiovascular outcomes, the answer is no.
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Allopurinol and aspirin are both competitive inhibitors of enzymes. Allopurinol inhibits Xanthine oxidase and may control the production of active oxygen species, so it can prevent oxidative stress and may help in prevention of injuries to heart tissues during open heart surgery, or Ischemic heart diseases. You can go through my work done on Allopurinol: Ali Movahed , KG Nair,TF Ashavaid, Pavan Kumar, Free radical generation and the roleof allopurinol as a cardioprotective agent during coronary artery bypass grafting surgery. Can J Cardiol vol 12 FEBRURY 1996.