Vitamin B₃ tablets, known as niacin tablets, have the effect of participating in the process of biological oxidation. Side effects include feeling warm, redness of the skin, headache, etc., and the use of medication is subject to medical advice. Niacin can be converted in the body to participate in the body’s biological oxidation process, and the lack of niacin can lead to pellagra, the symptoms of lack of appetite, irritability and insomnia, abnormal sensation, lingual inflammation, dermatitis and so on. Vitamin B₃ tablets are mainly used for the prevention and treatment of pellagra, stomatitis, lingual inflammation, etc. It is also used for the treatment of coronary heart disease, viral myocarditis, rheumatic heart disease and cardiac arrhythmia associated with oligodeoxynivalenol intoxication, etc. (applied only after the inefficacy of several other drugs). After the use of the drug may appear skin redness (especially the face and neck), feel warm and headache and other vasodilatory reactions of adverse reactions; if large doses of the drug, it will lead to nausea, vomiting, stomach pain, itching, diarrhea, dizziness, fatigue, dry eyes, cardiac arrhythmia, hepatotoxicity, hyperglycemia, hyperuric acid of adverse reactions. Contraindications include hypersensitivity to the product. Specific use of the drug should be under the guidance of a specialist, not unauthorized use of the drug.