Side effects of treatment for pancreatic cancer vary depending on the type of treatment. For example, radiation treatment (which is a local treatment) side effects tend to accumulate throughout the course of radiation therapy and include fatigue, nausea, and diarrhea. Chemotherapy side effects depend on the type of chemotherapy given (less aggressive chemotherapy treatments typically cause fewer side effects whereas more aggressive combination regimens are more toxic) and can include fatigue, loss of appetite, change in taste, hair loss (although not usually), and lowering of the immune system with risk for infections (immunosuppression). While these lists of side effects may seem worrisome, radiation doctors (radiation oncologists) and medical oncologists have much better supportive medications than they did in years past to control any nausea, pain, diarrhea, or immunosuppression related to treatment. The risks associated with pancreatic cancer treatment must be weighed against the inevitable and devastating risks associated with uncontrolled pancreatic cancer and, if the treatments control progression of the cancer, most patients feel better on treatment than they otherwise would.