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Doctors Medicines MCQs Q&A

  1. Antiseptic
  2. Analgesics
  3. Antipyretic
  4. Antibacterial
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Option 4 : Antibacterial

The correct answer is Antibacterial.

  • Sulfa antibiotics were first used in the 1930s.
  • While antibiotic resistance remains a problem for this class of antibiotics, sulfa drugs are still commonly used to treat a variety of bacterial infections.
  • Sulfa drugs work by binding and inhibiting a specific enzyme called dihydropteroate synthase (DHPS). This enzyme is critical for the synthesis of folate, an essential nutrient. Mammals get folate from their diet, but bacteria must synthesize this vitamin.
  • Sulpha drugs kill bacteria and fungi by interfering with their metabolism.
    • Sulphapyridine is a sulphonamide antibacterial drug.
    • It is no longer prescribed for the treatment of infections In humans.
    • It Is a good antibacterial drug, but its water solubility is very pH-dependent. 
    • Thus, there is a risk of crystallisation within the bladder or urethra, which could lead to pain or blockage.
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