vitamin b12 injection over the counter Compounded Methylcobalamin (Vitamin B12) Injection, 5mg/mL Cyanocobalamin is a man Vitamin B-12 Injection, 3,000 mcg/ml

Certain medications The following drugs can reduce levels of vitamin B12 in your body: Antibiotics -- long-term use can lower vitamin B levels generally Anti-seizure drugs Chemotherapy medicines, especially methotrexate Drugs used to reduce stomach acid, like H2 blockers (Pepcid AC, Tagamet, Zantac) and proton pump inhibitors (Nexium, Prevacid, Prilosec) Metformin (Glucophage) -- taken for diabetes Colchicine -- taken for gout Some cholesterol-lowering medications Other causes You're over 65

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In the body, hydroxocobalamin is converted to the active form of vitamin B12, methylcobalamin

This vitamin is often present naturally in animal products