Biologicals, also known as biopharmaceuticals or biologic drugs, are a diverse group of medications derived from living organisms or their components. Unlike traditional drugs, which are typically small molecules synthesized chemically, biologicals are large, complex molecules produced through biological processes. They encompass a wide range of therapeutic agents, including vaccines, blood products, gene therapy, and monoclonal antibodies.

Biologicals have revolutionized the treatment of various diseases, particularly in areas like autoimmune disorders, cancer, and infectious diseases. Their targeted action and high specificity offer significant advantages over conventional drugs. However, due to their complex nature, biologicals are often more expensive to produce and require specialized handling and storage conditions.