Of course, methylcobalamin tablets cannot be taken casually. Methylcobalamin tablets belong to the prescription class of drugs and are mainly suitable for the treatment of peripheral neuropathy. For example, if a patient is diagnosed with diabetic peripheral neuropathy, multiple peripheral neuritis, or peripheral nerve damage caused by alcoholism, etc., which manifests as numbness and pain in the limbs, he can take mecobalamin orally to promote peripheral nerve recovery. If the patient does not have peripheral nerve disease, oral mecobalamin tablets are not required. Although mecobalamin tablets are endogenous vitamin B12 with high safety, patients without corresponding diseases do not need to take them orally because “it is a medicine with three toxins”. Occasionally, adverse reactions may occur when taking mecobalamin tablets, such as loss of appetite, nausea, vomiting and diarrhea, but the incidence is relatively low, around 0.1% to 5%.