A suitable oral regimen can replace vitamin B12 for many people, including some people with diet-related deficiency and some people for whom high-dose oral treatment is chosen despite suspected malabsorption
Before taking a B12 shot, tell your doctor if you: Are allergic to B12, cobalt or any multivitamin combinations Have vision issues or Lebers disease (a genetic condition that causes vision loss) Have any infections Have been diagnosed with folic acid deficiency or iron deficiency Are pregnant, breastfeeding, or planning to get pregnant Are taking any supplements, including herbal supplements Are taking any medications, such as folic acid, methotrexate, chloramphenicol, colchicine, para-aminosalicylic acid (PAS), or pyrimethamine Have liver or kidney disease Have a drinking problem RxList
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Potency, sterility, endotoxin levels, and degradation products can vary between compounding pharmacies
Each 5 mg vial provides approximately 10 days of dosing at 500 mcg/day or 1617 days at 300 mcg/day
Second, calculate the injection volume: divide the desired dose (in mcg) by the concentration (in mcg/mL)