What people take methylcobalamin best this statement is not appropriate, the patient should be based on the disease and symptoms to choose the right drug, methylcobalamin is mainly used for the treatment of peripheral neuropathy, but the therapeutic effect of individual differences. Mecobalamin belongs to the nervous system drugs, mainly used for peripheral neuropathy treatment. If the indications are met, the drug can be taken as prescribed by the doctor. Methylcobalamin may cause nausea, vomiting, loss of appetite, diarrhea, fever, sweating, headache and other adverse reactions, some of the symptoms are mild, in the process of using the drug can disappear, such as persistent or affecting the life, you should stop the drug and consult a doctor immediately. If allergic reactions such as skin rash, blood pressure drop occur, stop the drug immediately and consult a doctor for treatment. Children, pregnant women, lactating women should be cautious; Methylcobalamin is prohibited for those who are allergic to methylcobalamin; if the drug is not effective for more than one month, the drug should be discontinued and a follow-up consultation should be carried out; People who are engaged in the work of mercury and its compounds should not take a large amount of it for a long period of time; Elderly people and children should be guided by a specialist physician in the use of the drug. If there is a need for medication, it should be used under the guidance of a specialist, and it is not recommended to use it on your own to avoid adverse consequences.