Sulfadimidine

An article about the antibiotic sulfadimidine

Sulfadimidine

Sulfadimidine, also known as sulfamethazine, is a sulfonamide antibiotic used in the treatment of various bacterial infections. It is particularly effective against Gram-positive and some Gram-negative bacteria.

Mechanism of Action

Sulfadimidine works by inhibiting the bacterial synthesis of folic acid, which is essential for bacterial growth and replication. It achieves this by competitively inhibiting the enzyme dihydropteroate synthase, which is involved in the synthesis of dihydrofolic acid. This action ultimately leads to the inhibition of bacterial DNA synthesis.

Pharmacokinetics

Sulfadimidine is well absorbed from the gastrointestinal tract when administered orally. It is distributed throughout the body, including the central nervous system. The drug is metabolized in the liver and excreted primarily through the kidneys.

Clinical Uses

Sulfadimidine is used to treat a variety of infections, including:

• Urinary tract infections
• Respiratory tract infections
• Gastrointestinal infections
• Skin infections

Side Effects

Common side effects of sulfadimidine include:

• Nausea
• Vomiting
• Diarrhea
• Allergic reactions, such as rash and urticaria

Serious side effects can include:

• Stevens-Johnson syndrome
• Agranulocytosis
• Aplastic anemia

Contraindications

Sulfadimidine should not be used in individuals with a known hypersensitivity to sulfonamides. It is also contraindicated in patients with severe liver or kidney impairment.

Interactions

Sulfadimidine can interact with other medications, such as:

• Methotrexate
• Warfarin
• Phenytoin

These interactions can increase the risk of side effects or reduce the effectiveness of the medications.

Related pages

• Antibiotic
• Sulfonamide (medicine)
• Bacterial infection

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  Sulfadimidine