Immunotherapy and Targeted Therapy · NCLEX Exam

Which of the following best describes “on-target off-tumour” toxicity in targeted therapy?

  1. A drug that affects only the intended tumour target
  2. A drug harming healthy cells that share the tumour's target
  3. A drug that misses its intended molecular target entirely
  4. A side-effect unrelated to where the target is expressed
Show answer and explanation

Correct answer: A drug harming healthy cells that share the tumour's target

“On-target off-tumour” toxicity occurs when the molecular target is present on both tumour and some normal cells, causing unintended damage to healthy tissue.

Difficulty: Medium Question 13 of 20

Practice all 20 Immunotherapy and Targeted Therapy questions

Keep practicing

More Immunotherapy and Targeted Therapy questions