Biopharmaceuticals, also known as biologics, have revolutionized the treatment of many human diseases in recent years. Immunologic conditions, diabetes, and some forms of cancer are now routinely treated with biopharmaceuticals. Biologics are large protein-based compounds that are developed from biological sources. Insulin was the first biopharmaceutical approved and is still the most used worldwide. Among recently approved biopharmaceuticals, monoclonal antibodies (mAbs) are the most common, and the success of these compounds is expected to continue over the coming years.