Q33: High Yield PLAB 1 Exam Style Question

A. Do not make any medication changes

B. Stop pyrizinamide

C. Stop ethambutol

D. Stop isoniazid

E. Stop rifampicin

This is a high yield recall. Try to answer this question in 50 seconds. Comment your answer below. The answer to this question is given below.

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The correct answer is C

• Ethambutol is associated with optic neuropathy and the development of colour blindness. It should be discontinued if these symptoms develop. In clinical practice, pyridoxine (vitamin B6) is given concurrently with ethambutol to try to prevent these side effects

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