Vitamin B₁ belongs to a commonly used kind of vitamin, clinically it is mainly used for the prevention and treatment of diseases caused by vitamin B₁ deficiency, such as beriberi, neuritis, dyspepsia, etc. It is the same for men and women, and does not have any special role and function for men. Actions and functions: Prevention and treatment of diseases caused by vitamin B₁ deficiency, such as beriberi, neuritis, dyspepsia and so on. It can also be used for vitamin B₁ supplementation during pregnancy or lactation, hyperthyroidism, burns, long-term chronic infections, heavy physical labor, malabsorption syndromes with liver and gallbladder disorders, diseases of the small intestinal system and after gastrectomy. Adverse effects of the drug: almost no toxicity in normal doses, but overdosage may cause dizziness and weakness, loss of appetite, diarrhea and other symptoms. Contraindications: not yet clear. Precautions: must be used in accordance with the recommended dose, not overdose; allergy to the drug is prohibited, allergic patients with caution. Vitamin B₁ should be used under the guidance of a professional doctor to avoid abusing the drug by yourself.