Methylcobalamin tablets and methylcobalamin capsules are only different production process, the efficacy is the same, there is no obvious difference between the two, the specific choice of which preparation can be combined with their own situation. Methylcobalamin belongs to the category of nutritive nerve drugs, commonly used in peripheral nerve diseases. Some people may experience diarrhea, loss of appetite, vomiting, nausea and other gastrointestinal symptoms after taking this drug, and occasionally skin diseases such as rashes, which should be discontinued after the occurrence of the above symptoms and consult a doctor. People who are allergic to this drug are prohibited from taking it. It should also be noted that if the condition does not show any improvement after taking it for more than a month, it is not recommended to continue taking it. People who work with mercury and its compounds are also not recommended to take this drug in large quantities for a long time. Warm reminder: to follow the doctor’s instructions to use the drug, not blindly take the drug on their own.