Dear Becca, During the preoperative appointment we go through a list of medications, vitamins and herbs that must be stopped three weeks prior to surgery. Aspirin is one of the OTC medications that must be stopped as it leads to excess bleeding during and after the procedure. Patients who have a history of headaches or migraines have a special appointment with the anesthesiologist to direct them of medications that are safe. In other patients we always provide plain tylenol tablets to them in their surgical "Goody Bags." Speak with your surgeons office for their protocol. Best regards, Michael V. Elam, M.D.