Vitamin B tablets can be taken for a long time if needed for treatment, whether it is available or not should ask the relevant doctor, such as non-physical need is not recommended for long-term use. B vitamins are water-soluble vitamins, including vitamins B1, B2, B3, etc. They can regulate body metabolism, enhance immune function, enhance the function of the body’s nervous system, and promote cell growth, etc. Different B vitamins can be used for the treatment of different diseases, and the duration and dosage of the medicine should be chosen according to one’s own physical condition and the advice of the doctor. Long-term use of B vitamins may cause a series of adverse reactions, large doses may lead to irritability, fatigue, etc. Long-term use of B vitamins may also cause severe peripheral neuritis, numbness in the hands and feet. The medication should be taken strictly under the guidance of a doctor, and should not be taken without authorization, prolonging the duration of the medication or increasing the dosage.