Fenoldopam mesylate, 6-chloro-2, 3, 4, 5-tetrahydro-l- (4- hydroxyphenyl)–1H-3-benzazepine-7, 8-diol, methane sulfonate (FD, a highly selective DRD1 agonist) therapeutic efficacy in psoriasis has been suggested by several researchers [86,119,215]. The gene discussed is DRD1; the disease is psoriasis.