Prophylaxis of is essential to prevent which vitamin deficiency in patients taking isoniazid?
Correct Answer: B6
Description: Ans. is 'd' i.e., B6 * Isoniazid reacts with pyridoxal to form a hydrazone, and thus inhibits gneration of pyridoxal phosphate.* Isoniazid also combines with pyridoxal phosphate to interfere with its coenzyme function. Due to formation of hydrazones, the renal excretion of pyridoxine compounds is increased.* Thus, isoniazid therapy produces a pyridoxine deficiency state.
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