Methylcobalamin tablets are not used to treat insomnia. Methylcobalamin is an endogenous vitamin B12, which can play a role in nerve nutrition. In clinical practice, methylcobalamin is usually used for peripheral neuritis caused by various reasons, and can improve the symptoms of numbness of the limbs of patients, such as peripheral neuritis caused by diabetes, peripheral nerve damage after long-term heavy drinking, and polyneuritis of patients, or numbness and pain of limbs caused by sciatica and herniated disc in orthopedics, etc. Methylcobalamin can be applied to improve the symptoms. In anemia diseases or patients with gestational anemia when they are pregnant, they can use methylcobalamin to treat, and there is also methylcobalamin plus folic acid tablets to prevent and control hyperhomocysteinemia. The clinical treatment of insomnia is a lot of drugs, including Chinese and Western medicine, Chinese medicine such as Baili Sleep Capsules, Sweet Dreams Capsules, and Western medicine such as eszopiclone, diazepam, dexrazoxane, dexrazopiclone and other types of sleeping pills.