What is the Capecitabine mechanism of action? The medicine is in an inactive form; after swallowing it, it converts to 5-fluorouracil. This capecitabine mechanism of action is blocking the enzyme called thymidylate synthase. This enzyme is crucial for the cancer cells for their replication. Therefore, after the blocking, this stops the cancer cell growth and division. Visit - https://www.globanspharma.com/products/xeloda-500mg-tablet