Barigen 4 mg consists of baricitinib, which is a prescription drug used to suppress the activity of Janus kinases (JAK), enzymes associated with immune response. Barigen must be prescribed by a licensed healthcare provider. Prior to initiation of therapy, healthcare providers must conduct a detailed analysis of the patient’s medical records, medications taken, risk of infections, hematological data, as well as data on liver and renal functions. Baricitinib can elevate the risk of developing infections and other side effects. The correct dosage depends on a variety of factors related to the patient and local prescribing practice.