Diabetic patients can take methylcobalamin, this drug is mainly used for the treatment of diabetic peripheral neuropathy, when diabetic patients with symmetrical numbness, pain, sensory abnormalities of the lower extremities, suggesting a combination of diabetic peripheral neuropathy, can be treated with methylcobalamin. Mecobalamin is divided into injectable and oral dosage forms. Patients with diabetic peripheral neuropathy are usually given methylcobalamin injection intravenously during hospitalization to nourish the nerves and alleviate the symptoms of lower limb numbness. Once the patient is discharged from the hospital, oral methylcobalamin tablets are given to provide the same therapeutic effect.