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Data are lacking from long-term studies to assess whether oral treatment is effective when doses are administered less frequently than daily
Adults should avoid combining multiple B12-containing products without checking the total intake, since multivitamins, energy supplements, and fortified products may all contain B12
It is also a key factor in the function and development of the brain and nerves
An intradermal test dose is recommended prior to administration in patients suspected of being sensitive to the drug
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