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What is the proper dose for a B12 injection?

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The proper dose for a B12 injection depends on the type of health problem and a person's health condition. A patient gets an injection once a day for the first 6 to 7 days. If the condition starts improving, the dose is one injection a day for 2 weeks, and then one injection every 3 to 4 days for 2 to 3 weeks, notes the United States National Institutes of Health's MedlinePlus.

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Full Answer

Patients suffering from pernicious anemia may have to get the injection for the rest of their lives, notes Drugs.com. Also known as cyanocobalamin, B12 injection is a man-made form of vitamin B12 used to treat vitamin B12 deficiency. This vitamin helps the body to make use of carbohydrates and fats to make proteins and get energy.

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