Although, Tassaneeyakul et al. was the first to identify an association between HLA-B*58:01 and allopurinol-induced SJS-TEN in Thai (Tassaneeyakul et al., 2009), no published data have yet confirmed such a strong correlation of HLA-B*58:01 and allopurinol-induced DRESS and MPE in Thai patients. The gene discussed is HLA-B; the disease is toxic epidermal necrolysis.