Sulfisoxazole

Chemical Structure / Formula of Sulfisoxazole

  • Formula: C11H13N3O3S
  • Structure: Isoxazole-containing sulfonamide.

Sulfisoxazole

Mechanism of Action

  • Inhibits folic acid synthesis by competing with para-aminobenzoic acid (PABA) for dihydropteroate synthase.

Uses of Sulfisoxazole

  • UTIs, otitis media (often in combination with erythromycin).

Side Effects

  • GI upset, allergic reactions, crystalluria.

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