Owing to our wide distribution network, we have been able to offer superior grade Myezom. It is used in the treatment of multiple myeloma (a type of blood cancer) and mantle-cell lymphoma. Bortezomib belongs to the class of drugs called proteasome inhibitors. Proteasomes are proteins which play an important role in growth and multiplication of cancer cells. Bortezomib blocks the action of proteasome, and reduces the growth of cancerous (actively growing) cells.