Keywords: BRAF inhibitor; BRAF inhibitor Stevens-Johnson syndrome; BRAF inhibitor toxic epidermal necrolysis; LTT, lymphocyte transformation test; NO, nitric oxide; RIP3, receptor-interacting protein kinase 3; SJS, Stevens-Johnson syndrome; Stevens-Johnson syndrome; Stevens-Johnson syndrome desensitization; TEN, toxic epidermal necrolysis; allergic reaction; antitumor response; antitumor response toxic epidermal necrolysis; coBRIM adverse effect; coBRIM allergic reaction; coBRIM hypersensitivity; coBRIM, combined cobimetinib and vemurafenib therapy; cross-reactivity; dabrafenib; dabrafenib toxic epidermal necrolysis; dabrafenib vemurafenib; dabrafenib vemurafenib switch; hypersensitivity; lymphocyte transformation test Stevens-Johnson syndrome; lymphocyte transformation test toxic epidermal necrolysis; melanoma; metastatic melanoma; sulfonamide; sulfonamide cross-reactivity; sulfonamide drug; sulfonamide toxic epidermal necrolysis; toxic epidermal necrolysis; toxic epidermal necrolysis desensitization; toxic epidermal necrolysis/Stevens-Johnson syndrome; vemurafenib; vemurafenib adverse effect; vemurafenib allergic reaction; vemurafenib dabrafenib cross-reactivity; vemurafenib hypersensitivity; vemurafenib toxic epidermal necrolysis.