Pseudoporphyria is an infrequent blistering skin disease. The occurrence of this entity has been attributed to exposure to UV radiation, chronic kidney failure associated or not with dialysis, and use of multiple drugs including diuretics.1 To our knowledge, torsemide has not been reported as a cause of pseudoporphyria; likewise, cross-reaction with furosemide had been suspected theoretically but not observed in any patient.
Pérez-Bustillo A, Sánchez-Sambucety P, Suárez-Amor Ó, Rodríiguez-Prieto MA. Torsemide-Induced Pseudoporphyria. Arch Dermatol. 2008;144(6):812-813. doi:10.1001/archderm.144.6.812