Phthalylsulfathiazole

Molecular Formula: C17H13N3O5S2
CAS Number: CAS-85-73-4
Appearance: White powder.

Phthalylsulfathiazole belongs to the group of drugs called sulfonamides. The drug is a broad-spectrum antimicrobial that can treat different types of infections including intestinal. The mechanism of action depends on competitive antagonism with para-aminobenzoic acid and inhibition of dihydropteroate synthetase activity, which in turn leads to impaired synthesis of dihydrofolic acid and as a result its active metabolite necessary for the synthesis of purine and pyrimidine.

The drug is indicated in the treatment of dysentery, colitis, gastroenteritis and intestinal surgery. It is not absorbed into the blood stream from the gut. Adverse effects may include allergic reactions, vitamin B insufficiency, agranulocytosis and aplastic anemia.