Vitamin B1 is used for the prevention and treatment of beriberi, neuritis, and dyspepsia caused by vitamin B1 deficiency. Vitamin B2 is mainly used for the treatment of corns, tongue, lips, scrotum and conjunctivitis caused by vitamin B2 deficiency. 1. Vitamin B1 can participate in the formation of coenzymes in the body, and can maintain normal sugar metabolism and the nervous system, digestive system function, so when the intake of insufficient, there may be beriberi, as well as accompanied by peripheral neuritis, etc., in the treatment of treatment for the cause of the disease in addition to the treatment, but also need to be given to improve some of the symptoms of the drug treatment. The adverse effects of vitamin B1 are relatively few, and there are generally no toxic side effects when taken in normal doses. Overdosage may cause headache, diarrhea, swelling and irritability, decreased appetite and other gastrointestinal nervous system reactions. Contraindications are not clear. 2. Vitamin B2 is an important component of coenzymes, which can participate in the metabolism of saccharides, proteins and fats, maintain normal visual function and promote growth, so it is mainly used for the treatment of various symptoms caused by vitamin B2 deficiency in clinical practice. Adverse effects of vitamin B2 are relatively rare, the vast majority of people may cause yellow urine after taking it, but it does not produce toxicity. Contraindications are unclear. Vitamin B1 and vitamin B2 are both water-soluble vitamins, and should be used only as directed by a physician to avoid adverse effects.