Vitamin B6 injection can be given subcutaneously, intramuscularly or intravenously. If given intravenously, 50-100 mg can be administered at a time and used once a day. If used for detoxification of poisoning, the dose used may be higher. Vitamin B6 injection is a vitamin supplement that can be used for the prevention and treatment of various diseases caused by vitamin B6 deficiency, as well as for the treatment of seborrheic dermatitis when there is severe vomiting in pregnancy, or vomiting caused after radiotherapy or chemotherapy. It can also be used to prevent and treat isoniazid poisoning and cycloserine poisoning, both of which can be treated with vitamin B6 detoxification. There are also patients who are unable to eat by mouth and should pay attention to vitamin B6 supplementation during intravenous infusion to prevent vitamin B6 deficiency.