“…The common function of CMs is the suppression of prostaglandin E 2 (PGE 2 ) production. We have suggested that the common function of CMs might be important for the onset of CM-related SJS/TEN with SOC ( Ueta et al, 2010a ; Ueta, 2016 ; Ueta, 2018 ; Ueta, 2020 ; Ueta, 2021a ; Ueta, 2021b ) because PGE 2 suppresses mucocutaneous inflammation ( Kunikata et al, 2005 ; Ueta et al, 2009a ; Honda et al, 2009 ); PGE 2 acts on EP3 (PGE 2 receptor 3) in the epidermis ( Honda et al, 2009 ) and the mucosal epithelium such as the conjunctival ( Ueta et al, 2009a ) and tracheal epithelium ( Kunikata et al, 2005 ), and it negatively regulates mucocutaneous inflammation ( Kunikata et al, 2005 ; Ueta et al, 2009a ; Honda et al, 2009 ). We have suspected that CMs including acetaminophen and NSAIDs could upregulate inflammatory responses by suppressing the production of PGE 2 which suppresses mucocutaneous inflammation, that they augment abnormal immune responses, and that they elicit the induction of SJS/TEN with SOC ( Ueta et al, 2010a ; Ueta, 2016 ; Ueta, 2018 ; Ueta, 2020 ; Ueta, 2021a ; Ueta, 2021b ).…”