What is a biosimilar?

What is a biosimilar?

• A. A drug that is identical to the authorized biologic drug.
• B. A drug that is derived from minerals.
• C. A drug that is highly similar but not identical to an authorized biologic drug.
• D. A small-molecule generic version.

Answer: (C)

A biosimilar is a biologic product that is highly similar to an approved reference biologic, with no clinically meaningful differences in safety, purity, or potency. Because biologics are large, complex proteins produced in living systems, an exact copy cannot be guaranteed; there can be minor differences in structure or manufacturing. What matters is that these differences do not lead to differences in how well the product works or in its safety profile, including immunogenicity. Regulatory agencies require thorough analytical, nonclinical, and clinical data showing high similarity and no meaningful differences before a biosimilar is approved for the same uses as the reference product. This is different from a small-molecule generic, which is an identical chemical copy of a simple molecule.

A biosimilar is a biologic product that is highly similar to an approved reference biologic, with no clinically meaningful differences in safety, purity, or potency. Because biologics are large, complex proteins produced in living systems, an exact copy cannot be guaranteed; there can be minor differences in structure or manufacturing. What matters is that these differences do not lead to differences in how well the product works or in its safety profile, including immunogenicity. Regulatory agencies require thorough analytical, nonclinical, and clinical data showing high similarity and no meaningful differences before a biosimilar is approved for the same uses as the reference product. This is different from a small-molecule generic, which is an identical chemical copy of a simple molecule.