sulfisoxazole

noun

sul·​fi·​sox·​a·​zole

variants or chiefly British sulphisoxazole

ˌsəl-fə-ˈsäk-sə-ˌzōl 

: a sulfa drug C₁₁H₁₃N₃O₃S derived from sulfanilamide that is less likely than other sulfanilamide derivatives to produce renal damage because of its greater solubility