Additional Study Information: The purpose of this study is to determine whether the drug, bethanechol, could potentially be used in combination with surgery to decrease the chance of the cancer coming back after it is removed. Bethanechol is a medication that regulates the parasympathetic nervous system and is often used to manage the side effects of chemotherapy drugs and to manage urinary retention. Studies of pancreatic cancer in animal models have shown that treatment with bethanechol can inhibit cancer growth and spread. People with pancreatic cancer localized to a small area usually undergo surgery to remove the tumor.