Jakavi Tablet contains Ruxolitinib and is a prescription medicine used for certain blood and bone marrow conditions. It works by affecting JAK1 and JAK2 pathways involved in blood-cell production and immune activity. The dose and duration of treatment depend on the individual's condition and medical advice. Regular blood tests may be needed during treatment. Possible side effects can include changes in blood cell counts, fatigue, and an increased risk of infections.