Adenosylcobalamin tablets are vitamin drugs used to treat diseases caused by vitamin B12 deficiency, such as anemia in pregnancy and malnutritional anemia. It is also used as an adjunct in the treatment of nutritional disorders or radiation and drug-induced leukopenia. The medication may cause allergic reactions. The medicinal ingredient of Adenosylcobalamin Tablets is 5′-deoxyadenosylcobalamin, one of the two active coenzyme forms of vitamin B12 in the body, which is essential for cell growth and proliferation and for maintaining the integrity of nerve myelin. The contraindications of Adenosylcobalamin Tablets are not clear, but it should be noted that Patients who are allergic to this drug are prohibited from taking it, and allergic patients should use it with caution. Pregnant and lactating women should take it under the supervision of physician, and patients with neurological damage should use it with caution before the diagnosis is not clear. If patients need to use adenosylcobalamin tablets, please consult a professional doctor, follow the doctor’s instructions, reasonable use of medication.