Sulfathiourea

Sulfathiourea

Chemical structure of sulfathiourea

Sulfathiourea is a sulfonamide antibiotic that belongs to the class of sulfa drugs. It is used in the treatment of bacterial infections by inhibiting the growth and proliferation of bacteria.

Chemical Structure

Sulfathiourea is characterized by its chemical structure which includes a sulfonamide group attached to a thiourea moiety. The presence of these functional groups is crucial for its antibacterial activity.

Mechanism of Action

Sulfathiourea works by interfering with the synthesis of folic acid in bacteria. It competes with para-aminobenzoic acid (PABA) for the active site of the enzyme dihydropteroate synthase, which is essential for the production of folic acid. Without folic acid, bacteria cannot synthesize nucleic acids and ultimately cannot grow or reproduce.

Clinical Uses

Sulfathiourea is used to treat a variety of bacterial infections, particularly those caused by Gram-positive bacteria. It is often used in combination with other antibiotics to enhance its effectiveness and reduce the risk of resistance.

Side Effects

Common side effects of sulfathiourea include allergic reactions, such as rash and itching, as well as gastrointestinal disturbances like nausea and vomiting. In rare cases, it can cause more severe reactions such as Stevens-Johnson syndrome or toxic epidermal necrolysis.

Resistance

Bacterial resistance to sulfathiourea can occur through various mechanisms, including the production of an altered dihydropteroate synthase enzyme that has a reduced affinity for the drug, or through increased production of PABA.

Related pages

• Sulfonamide (medicine)
• Antibiotic resistance
• Folic acid synthesis