The example of Humira is a terrible one: as a monoclonal antibody, to produce the exact molecule would require another company getting its hands on the plasma c

The example of Humira is a terrible one: as a monoclonal antibody, to produce the exact molecule would require another company getting its hands on the plasma cells that produce it. It is not as simple as copying the chemical steps to produce the drug, as in Lipitor. Complicating this, there is evidence that not all Monoclonal antibodies that act on the same receptor are made equal - some might be antagonists whereas others are agonists.