Photoparoxysmal Response 1, also known as photosensitivity disease, is related to porphyria, congenital erythropoietic and protoporphyria, erythropoietic, 1, and has symptoms including exanthema, pruritus and photophobia. An important gene associated with Photoparoxysmal Response 1 is PPR1 (Photoparoxysmal Response 1), and among its related pathways/superpathways are Hemesynthesis defects and porphyrias and TRP channels. The drugs Fluorouracil and Diclofenac have been mentioned in the context of this disorder. Affiliated tissues include skin and brain, and related phenotypes are eeg with photoparoxysmal response and Increased shRNA abundance (Z-score > 2)