Vitamin B12 tablets work as a vitamin B12 supplement for the treatment of megaloblastic anemia, contraindications for cobalt or vitamin B12 allergy. Vitamin B12 Tablets is a vitamin drug, its efficacy is to supplement vitamin B12, vitamin B12 is involved in the body’s metabolism of folic acid and the synthesis of nerve myelin lipid, such as, if the lack of will lead to the maturation of blood cell division stagnation, may also appear the symptoms of nerve damage. Vitamin B12 tablets are mainly used for the treatment of megaloblastic anemia. Adverse effects of Vitamin B12 Tablets are hypokalemia and hyperuricemia. Precautions are that people with neurological damage should not use vitamin B12 until the diagnosis is clear; patients with gout can be induced to have gouty attacks if they use this product. Allergy to cobalt or vitamin B12 is prohibited. If you need to use vitamin B12 tablets, you need to use the drug under the guidance of a physician, do not take it on your own to avoid adverse consequences.