Methylcobalamin cannot be used to treat constipation. Methylcobalamin is an endogenous coenzyme, a derivative of vitamin B12. It is involved in the production of nerve cells and red blood cells in the human body, and has the effect of repairing and nourishing nerves. It is commonly used clinically in the treatment of peripheral neuropathy, such as peripheral neuritis, neuralgia and nerve disorders. Therefore, methylcobalamin cannot be used to treat constipation. Constipation is related to poor lifestyle and dietary habits, especially those who like to eat spicy and stimulating, greasy and not easily digestible food are prone to constipation. In addition, long-term constipation may also be caused by intestinal lesions, such as gastrointestinal nerve dysfunction, colon cancer and so on. You can improve constipation by eating a reasonable diet, exercising appropriately, drinking more water, and establishing good defecation habits. Eating more fiber-rich foods, such as fresh vegetables, fruits and coarse grains, can promote defecation. Patients with intestinal diseases can be treated for the causes. Patients with constipation should consult a doctor in time to clarify the cause of the disease, so as not to delay the condition and cause adverse reactions, and the drugs should be taken in accordance with the doctor’s instructions.