Therapeutic agents are substances used to treat, cure, or prevent diseases or medical conditions. These agents can include a wide range of medications, such as antibiotics, chemotherapy drugs, vaccines, and painkillers, as well as other treatments like physical therapy, surgery, and counseling. The goal of therapeutic agents is to improve a patient's health by targeting the underlying cause of their illness or symptoms. This field of research explores the development, testing, and evaluation of new therapeutic agents to improve patient outcomes and quality of life.