Vitamin B₆ as a drug, its role and efficacy for the prevention and treatment of vitamin B6 deficiency, can be used to inhibit vomiting, treatment of anemia, prevention and treatment of isoniazid poisoning and so on. 1. Suppressing vomiting: Vitamin B₆ has certain antiemetic effects, and can be used for vomiting caused by early pregnancy reaction in early pregnancy, as well as vomiting caused by tumor radiotherapy. 2. Treatment of anemia: vitamin B₆ has the effect of promoting the formation of hemoglobin in the body, so supplementation of vitamin B₆ for the correction of hemolytic anemia, thalassemia and other anemia has a certain effect. 3. Prevention and treatment of isoniazid poisoning: long-term overdose of isoniazid may lead to symptoms of poisoning, and vitamin B₆ can alleviate the symptoms of isoniazid poisoning. Therefore, it is used to prevent and control isoniazid poisoning. Vitamin B₆ has injections, tablets and so on, the use of vitamin B₆ treatment need to follow the doctor’s advice, under the guidance of the doctor.