VB generally refers to the B vitamins, its effect is to maintain the normal physiological function of the nervous system, has the role of treatment and prevention of diseases caused by B vitamin deficiencies, is generally not recommended for long-term use. There are many types of B vitamins, including vitamin B₁, B₂, B₃ (niacin), B₅ (pantothenic acid), B₆, B₇, B₁₂, and vitamin B₉ (folic acid), etc. B vitamins work in a complementary way and are generally useful for the maintenance of normal functions of the nervous system. normal function. A common medication for B vitamins is vitamin B complex tablets, which are used to treat and prevent malnutrition, anorexia, beriberi, pellagra, and other conditions caused by B vitamin deficiencies. Adverse reactions such as irritability, fatigue, and loss of appetite may occur if taken in high doses, and its contraindications are not yet clear. Complex vitamin B tablets, need to be used under the guidance of a doctor, is usually not recommended for long-term use, so as not to have adverse effects on the body.