Its a side-effect of the naming convention for generic drug naming [1]. Small molecule inhibitors end with “ib”. Monoclonal antibodies end with “mab”. Etc. [1]

Its a side-effect of the naming convention for generic drug naming [1]. Small molecule inhibitors end with “ib”. Monoclonal antibodies end with “mab”. Etc. [1] https://en.wikipedia.org/wiki/Drug_nomenclature https://en.wikipedia.org/wiki/Drug_nomenclature