Ruxolitinib is used in the treatment of myelofibrosis - which causes scar tissue to replace bone marrow. In addition, Ruxolitinib is also used to treat patients with polycythemia vera. However, the use of Ruxolitinib may experience some unwanted side effects such as dizziness, constipation, headache... Therefore, before using it, it is necessary to carefully study and follow the doctor's instructions. treatment .