Vitamin B₁₂ tablets, generally 25-100 μg a day (1-4 tablets a day), or 50-200 μg every other day (2-8 tablets every other day), in divided doses. Vitamin B₁₂ is mainly used in the treatment of megaloblastic anemia, with a general specification of 25 μg per tablet, 25-100 μg a day (1-4 tablets a day), or 50-200 μg every other day (2-8 tablets every other day), taken in divided doses. Side effects such as hypokalemia and hyperuricemia may be seen. Since megaloblastic anemia can be deficient in both vitamin B₁₂ and folic acid, it is necessary to clarify the need for simultaneous supplementation after diagnosis. Otherwise vitamin B₁₂ supplementation tends to mask the symptoms of hydrochloric acid deficiency. It is advisable to check potassium at 48 hours from the start of vitamin B₁₂ in order to detect possible severe hypokalemia in time. Patients with gout need to be alerted to the possibility of gouty attacks being induced and exacerbated by the use of this product because of accelerated nucleic acid degradation and elevated blood uric acid. Vitamin B₁₂ Tablets should be used under medical supervision.