Vitamin B complex tablets are mainly composed of vitamins B1, B2, B6, niacinamide and calcium pantothenate, and are mainly used for malnutrition, loss of appetite and foot disease due to B vitamin deficiency, pellagra, seborrheic dermatitis and polyneuritis due to niacin deficiency, mainly as an adjunctive therapy. Since B vitamins are widely involved in the metabolic processes of sugar, fat and protein in the human body, diseases caused by B vitamin deficiency are mostly manifested as systemic symptoms, and not a single systemic problem. When applying vitamin B, it should be noted that irritability, fatigue, skin flushing, etc. are all adverse reactions and should be discontinued.