How Are Biological Medicines Different from Other Medications?
Small-molecule medicines are the most familiar type of medicine compounds, typically contained in a pill, tablet, or capsule.1 Examples range from analgesics and other pain relievers to antibiotics, antidepressants, and antihypertensives. These medicines are considered small molecules because their active ingredient is small in size and chemical structure.2
Biological medicines are complex products that are derived from living organisms or organic substances and include therapeutic proteins, DNA vaccines, monoclonal antibodies, and related products used for treating certain diseases. They are large molecules and are far more complex than small-molecule medicines.2-5