Mecobalamin is the trade name of the medicine known as Mecobalamin Tablets. The main effect of this product is the treatment of peripheral neuropathy. Methylcobalamin Tablet is an endogenous coenzyme, a vitamin B12 derivative. Vitamin B12 is involved in the one-carbon unit cycle. This product can promote axonal transport function and axonal regeneration. Adverse reactions to methylcobalamin tablets are occasional loss of appetite, nausea, vomiting, and diarrhea. It is contraindicated in people with hypersensitivity to the components of methylcobalamin. It is necessary to pay attention to the use of the drug, if there is no effect of the drug for more than 1 month, then it is not necessary to continue using the drug. Workers engaged in mercury and its compounds should not take the drug in large quantities for a long time. Patients should use the drug under the guidance of a doctor.