BORTENAT 2MG contain Bortezomib which belongs to a group of medicine called proteasome inhibitor. Proteasomes plays an important role in controlling cell function and growth. By interfering with their function, it can kill cancer cells. It is used to treat multiple myeloma (a cancer of the bone marrow) and mantle cell lymphoma (a type of cancer affecting the lymph nodes) in patients 18 years or older.