Summary
This phase III trial studies how well eflornithine works compared to sulindac in preventing the return of the disease (recurrence) of high-risk adenomas and second primary disease in patients with stage 0-III colon or rectal cancer. Drugs used in chemotherapy, such as eflornithine and sulindac, work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading.