Sulfamethizole is a broad-spectrum sulfathiazole antibacterial of the Sulfonamide class, used for the bacteria causing urinary tract infections. Acting as a synthetic analog of para-aminobenzoic acid (PABA), it competitively inhibits this compound, which is a substrate of dihydropteroate synthetase in the folic acid pathway. It is also a mammalian target of rapamycin (mTOR) inhibitor.