There is no clear evidence to show what kind of food should not be eaten after taking methylcobalamin, but dietary attention should be paid to avoid spicy, greasy food to avoid affecting the recovery of the disease. In addition, people who work with mercury and its compounds should not take large amounts of methylcobalamin for a long time. Mecobalamin is mainly used in the treatment of peripheral neuropathy. Methylcobalamin is contraindicated in people who are allergic to methylcobalamin and related excipients. Possible adverse reactions after use include allergic symptoms, herpes of the oral cavity and tongue, crusting of the lips, congestion of the eyelid membranes, and occasionally loss of appetite, nausea, vomiting and diarrhea. Methylcobalamin is a relatively safe drug, there is no evidence that it can not be taken with what kind of drugs, in terms of diet, the main attention to avoid spicy, high salt, greasy and other drugs that are not conducive to peripheral nerve recovery. At the same time, if the long-term use of the drug is ineffective, or consumption of adverse reactions, it is recommended to consult a medical doctor, consult a professional doctor, do not take or stop taking the drug without authorization.