Additionally there are guidelines about HLA-B*1502, HLA-B*1511 and HLA-A*3101 and carbamazepine induced SCARs and HLA-B*1502 and lamotrigine, oxcarbazepine and phenytoin associated SJS/TEN [6,7,8,9,10,11,12,13]. The gene discussed is HLA-B; the disease is toxic epidermal necrolysis.