<prompt> Most common drug induced skin reaction:Maculopapular rashMorbilliform rashFixed Drug EruptionPhotosensitivity reaction  <response>: Ans. b Morbilliform rash. Ref Harrisons medicine 18,hch. 55DRUG-INDUCED SKIN REACTIONSMaculopapular eruptions are seen in the classic childhood viral exanthems, including:1rubeola measlesa prodrome of Coryza, Cough, and Conjunctivitis followed by Kopliks spots on the buccal mucosa; the eruption begins behind the ears, at the hairline, and on the forehead and then spreads down the body, often becoming confluent;2rubellathe eruption begins on the forehead and face and then spreads down the body; it resolves in the same order and is associated with retroauricular and suboccipital lymphadenopathy; and3erythema infectiosum fifth diseaseerythema of the cheeks Slapped-cheek appearance is followed by a reticulated pattern on extremities; it is secondary to a parvovirus B19 infection, and an associated arthritis is seen in adults. 