Sudden deafness is a very common disease in clinical practice, and patients can be treated with methylcobalamin, which is usually administered for about half a month. If the patient’s symptoms improve significantly after the medication, in such a case, it is recommended to continue to consolidate the treatment for 1 week. Mecobalamin belongs to western medicine and has good efficacy in treating peripheral neuropathy in clinical practice. Normally, patients need to drink more water after taking the drug to promote the absorption and metabolism of the drug, and the dosage can be reduced appropriately according to the patient’s age and symptoms. Patients may experience some adverse reactions after taking the drug, such as allergy, rash formation, sometimes conjunctival congestion of the eyes, and even gastrointestinal adverse reactions, such as loss of appetite, nausea, vomiting, diarrhea, in which case the drug should be discontinued in a timely manner and further consultation should be made at the hospital.