Whether methylcobalamin tablets are useful for the treatment of olfactory loss needs to be judged in different situations. Methylcobalamin is a kind of medication for the treatment of peripheral neuropathy, which has certain therapeutic effect on the hyposmia or loss of sense of smell due to olfactory nerve damage, but generally has no therapeutic effect on the hyposmia or loss of sense of smell caused by other reasons. Methylcobalamin Tablets is an endogenous vitamin B12 preparation, which can promote the utilization of folic acid and nucleic acid metabolism in neurons, and can promote the function of axonal transport and axonal regeneration, and can be used in the treatment of peripheral neuropathies, therefore, for the olfactory nerve damage caused by the sense of smell or loss of loss of olfaction, taking Methylcobalamin Tablets has a certain therapeutic effect. In addition to the olfactory nerve injury can lead to loss of smell, nasal obstruction, nasal mucosa inflammation, olfactory region sensory epithelial cell damage and other factors can also lead to loss of smell or loss of smell, these reasons lead to loss of smell or loss of smell, taking methylcobalamin treatment is generally not therapeutic effect. If the loss of sense of smell occurs, it is recommended to consult a doctor in time to clarify the specific cause of the disease, and then follow the doctor’s instructions to use methylcobalamin for treatment, avoid taking medication on their own and delaying the condition.