Respiratory System NCLEX Questions Related

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An adult is being treated with isoniazid (INH) and streptomycin for active tuberculosis. Which of the following symptoms would suggest a toxic effect of INH?

  • A. Paroxysmal tachycardia
  • B. Erythema multiforme
  • C. Peripheral neuritis
  • D. Tinnitus and deafness
Correct Answer: C

Rationale: Peripheral neuritis is a known toxic effect of isoniazid due to its interference with vitamin B6 metabolism.