Fig. 1From: Severe hypoglycemia during pneumocystis pneumonia treatment associated with trimethoprim–sulfamethoxazole use in a patient on peritoneal dialysisStructural similarities between sulfamethoxazole (a) and the basic structure of sulfonylurea (b). The sulfonamide group is encircled by the dotted line. R1 and R2 are different in each sulfonylureaBack to article page