The results showed that the rate of pneumonia in the TEN group was higher than that in the SJS group (p < 0.05); the rate of oral mucous membrane lesions in the SJS group was higher than that in the TEN group (p < 0.05); the rate of allopurinol (as a causative drug) in the SJS group was higher than that in the TEN group (p < 0.05); the time of hospitalization of the TEN group was longer than that of the SJS group (p < 0.01).