THE EXCRETION OF SULFANILAMIDE AND ACETYLSULFANILAMIDE BY THE KIDNEY OF THE RABBIT

Abstract
Clearance detns. of sulfanilamide and acetylsulfanilamide were made simultaneously with inulin, creatinine and diodrast on a series of rabbits. The mean clearance of sulfanilamide (1.8 cc/min.) was 30 and 40% of the mean clearance of creatinine and inulin respectively. The mean clearance of acetylsulfanilamide (4.9 cc/min.) was almost identical with that of creatinine. The results obtained were interpreted as meaning that sulfanilamide is excreted by glomerular filtration plus tubular reabsorption and acetylsulfanilamide is excreted solely by glomerular filtration. The clearances of both of these compounds were independent of their plasma conc. as well as the urine flow over the ranges included in the study.