Paper II
2025 March (Supplementary (SAY)) (2019 Scheme) · 100 marks · 180 min

Question

Assertion (A): Bedaquiline is used along with clofazimine in XDR TB. Reason (R): Two drugs acting on same target can antagonize each other.

Assertion) Bedaquiline is used along with clofazimine in XDR TB. Reason) Two drugs acting on same target can antagonize each other.

  • a) Both A and R are true and R is the correct explanation of A
  • c) A is true but R is false
  • b) Both A and R are true and R is not the correct explanation of A
  • d) A is false but R is true
Qxvii1 marksMCQs (A/R)

Answer

Correct answer: c) A is true but R is false

A is true — bedaquiline and clofazimine are both used within modern combination regimens for extensively drug-resistant TB. R is false and not applicable here: bedaquiline (inhibits mycobacterial ATP synthase) and clofazimine (binds mycobacterial DNA/generates reactive oxygen species) act through entirely different targets, not the same one — and the genuine clinical caution with this combination is additive QT prolongation, not target-based antagonism.

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