A client with TB is prescribed isoniazid (INH), rifampin, and pyridoxine. The nurse understands that pyridoxine is used in this combination to:
a. increase the action of INH and rifampin.
b. decrease the side effects of rifampin.
c. prevent INH-induced peripheral neuropathy.
d. increase the absorption of INH and rifampin.
ANS: C
Feedback
A Incorrect: Pyridoxine does not increase the action of INH and rifampin.
B Incorrect: Pyridoxine does not decrease the side effects of rifampin.
C Correct: Pyridoxine is used to prevent peripheral neuropathy associated with decreased levels of pyridoxine caused by INH.
D Incorrect: Pyridoxine does not increase INH or rifampin absorption.
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