RESUMO
Pantoprazole is a proton-pump inhibitor mainly used in treating various gastroesophageal disorders and frequently as prophylaxis for stress ulcers and gastrointestinal bleeding in most patients admitted for in-hospital management. Hypersensitivity reactions to this medication have been reported, although the exact incidence and prevalence are unknown. Further studies on proton-pump inhibitor allergic reactions should be conducted to enable physicians to safely select and prescribe an alternative type of medication within the same drug class, confidently avoiding the allergenic molecular compound that the patient reacted to previously. We present a case of a 35-year-old male postoperative bariatric patient with no significant allergy history who developed an allergic skin rash a week after being discharged on pantoprazole 40 mg. His rash was itchy and distributed mainly over the torso and lower limbs, without any additional respiratory or gastrointestinal symptoms.