When there is an indication for Methylcobalamin, diabetic patients can take Methylcobalamin under the supervision of a doctor. Methylcobalamin is a nerve-nourishing drug that can be used to treat diseases such as polyneuritis, trigeminal neuralgia, and diabetic neuropathy. Diabetic patients with unsatisfactory blood glucose control may develop neurological complications such as peripheral neuropathy, which can be treated with methylcobalamin, and should be actively controlled with blood glucose at the same time. Adverse reactions to methylcobalamin include rash, corneal congestion, loss of appetite, vomiting, and diarrhea. It is contraindicated in patients who are allergic to methylcobalamin. Diabetic patients should take methylcobalamin under the guidance of a physician, actively regulate blood glucose, and consult a doctor promptly if any adverse reactions occur during the administration of the drug.