A patient with infiltrative pulmonary tuberculosis, who was undergoing treatment with isoniazid, developed signs of B6 hypovitaminosis. What is the cause of this condition?

Answer options

1. A strong connection forms between vitamin and blood plasma proteins
2. Vitamin biotransformation speeds up
3. Vitamin elimination speeds up
4. Vitamin absorption slows down
5. Isoniazid is a vitamin B6 antagonist