Sulfonamides

  • Sulfamethoxazole and sulfasalazine; interferes with bacterial folic acid synthesis (needed for nucleic acid synthesis) by inhibiting dihydropteroate synthetase
  • Spectrum: GP/GN bacteria, Chlamydia, Nocardia
  • SE: hemolytic anemia (especially if G6PD-deficient), nephrotoxicity, hepatotoxicity, TEN, Stevens–Johnson syndrome (SJS), AGEP, photosensitivity
  • Contraindication: hypersensitivity to medication, pregnancy (third trimester)
  • Pregnancy category C (D in third trimester)