Original Biologic
The first FDA-approved version of a biologic drug, a large-molecule medicine derived from living cells, against which later biosimilars are compared. Also called the reference product, it establishes the safety and efficacy baseline that lower-cost competitors must demonstrate equivalence to.
What is an original biologic?
An original biologic is the first FDA-approved version of a biologic drug, a large-molecule medicine produced from living cells rather than chemical synthesis. It is also referred to as the reference product.
Because biologics are far more complex than conventional small-molecule drugs, the original biologic establishes the clinical baseline against which later, lower-cost versions are measured.
Why does the original biologic matter?
The original biologic sets the safety and efficacy standard that biosimilars must demonstrate they closely match. This reference role is central to how competition and pricing develop in the biologics market.
For life-sciences strategy and market intelligence, understanding the relationship between an original biologic and its biosimilars is key to anticipating market share shifts, pricing pressure, and prescribing trends once exclusivity ends.
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