Biological therapy patients are treated with substances commonly thought of as "natural." Your treatment may use proteins or other materials naturally produced by the human body. These are usually easier on your body than strong chemotherapy drugs. But biological therapy, also called "immunotherapy," does have side effects.
Common side effects of biological therapy include fatigue, fever, chills, and weakness. You may have nausea, vomiting and diarrhea. You may also develop headaches and changes in blood pressure. Some patients have serious skin rashes. And you may experience fluid buildup in your legs.
These side effects are usually worse after your first treatment. They tend to be less severe with additional treatments. Talk to your doctor to learn how to minimize side effects. Your doctor can give you tips to help make your recovery easier.