Adenosylcobalamin is an analog of cyanocobalt-type vitamin B12, which is an important coenzyme in the synthesis of nucleotides by cells. Its main role is to treat diseases caused by vitamin B12 deficiency, such as anemia in pregnancy and malnutritional anemia; it can also be used as an adjunctive treatment for nutritional diseases and radiation- and drug-induced leukopenia. No side effects of adenosylcobalamin have been identified. Adenosylcobalamin is involved in methyl conversion and folate metabolism in the body, promoting the reduction of methylfolate to tetrahydrofolate; it is involved in the tricarboxylic acid cycle, keeping mercapturial enzymes in an active state, thus participating in protein and fat metabolism; it promotes the development and maturation of erythrocytes, which are necessary for the complete formation of nerve sheath spinal cord fibers and maintaining the function of epithelial cells in the digestive system. Common dosage forms of Adenosylcobalamin are tablets and injections. Contraindications to adenosylcobalamin are unclear, but it should be noted that it is contraindicated in patients who are hypersensitive to adenosylcobalamin tablets, and the use of the drug in pregnant and lactating women is unclear. If you need to use Adenosylcobalamin, it is recommended to consult a professional doctor and follow the doctor’s instructions to regulate the use of medication.