Cyanocobalamin 1000mcg/mL; soln for IM or SC inj; contains benzyl alcohol. Give by IM or deep SC inj. Pernicious anemia: 100mcg daily for 6–7 days; then 100mcg every other day for 7 doses; then every ...
Verywell Health on MSN
How Long Does a B12 Shot Last In Your Body?
B12 shots work fast but don’t last long. Most leaves your body within a day, though some is stored in the liver. Regular injections may be necessary to maintain steady levels, especially if you have ...
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