Leflunomide for Henoch-Schonlein Purpura

When patients appeared with rashes and treated with antibiotics, antihistamines, calcium supplements, and glucocorticoids (2 mg/kg/d) for 5 days. The rashes do not subside or fresh rash still appears, and it frequently repeats more than 3 times during hospitalization. Leflunomide would be administered