A 60-year-old man with a history of myocardial infarction treated with 2 drug eluting stents 6 months ago presents for evaluation for endoscopic polypectomy. His screening colonoscopy demonstrated 4 tubular adenomas ranging from 5 to 8 mm but resection was not attempted because of his current aspirin and clopidogrel intake. When should he undergo endoscopic polypectomy and how should his medications be adjusted?