Complex vitamin B tablets generally have no protective effect on the gastric mucosa, the specific use of medication as prescribed by the doctor. Vitamin B complex tablets are compound preparations made of many kinds of vitamins, including vitamin B1, B2, B6, niacinamide and calcium pantothenate, the indications for the use of the drug for the prevention and treatment of anorexia, malnutrition, pellagra, psoriasis, foot fungus and other diseases due to the lack of the B vitamins, and the protection of the gastric mucosa is not very useful. The drug needs to be contraindicated in patients who are allergic to the product. Adverse reactions of skin flushing and itching may occasionally occur after the use of the drug, and if the dose of the drug is too large then the possible adverse reactions include irritability, fatigue, loss of appetite. Specific use of the drug should be carried out under the guidance of a specialist.