Gemcitabine Hydrochloride, Dasatinib, and Erlotinib Hydrochloride in Treating Patients With Pancreatic Cancer That Is Metastatic or Cannot Be Removed by Surgery

This phase I trial studies the side effects and best dose of gemcitabine hydrochloride and dasatinib when given together with erlotinib hydrochloride in treating patients with pancreatic cancer that has spread to other places in the body or cannot be removed by surgery. Drugs used in chemotherapy, such as gemcitabine hydrochloride, work in different ways to stop the growth of tumor cells, either by killing the cells or by stopping them from dividing. Dasatinib and erlotinib hydrochloride may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. Giving gemcitabine hydrochloride and dasatinib together with erlotinib hydrochloride may kill more tumor cells.