Barigen 4 mg (baricitinib) must be used strictly according to the instructions of a qualified healthcare provider. The dosage depends on several aspects, such as the underlying condition, renal function, age, and some others. You can use the drug with or without food, taking it once a day. The dosage cannot be altered or stopped without consulting a healthcare provider. In case you missed the dose, you need to follow the recommendations of your prescriber.