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Progressive weakness, worsening balance problems, or new neurological symptoms require prompt assessment, as these may indicate inadequate treatment or concurrent conditions
A deficiency in B vitamins can manifest in various ways, such as fatigue, anaemia, or neurological symptoms
Nitrous oxide: neurological and haematological toxic effects
Because its a water-soluble vitamin, any excess that isnt used should be flushed from the body and not pose too much risk (not the case with fat-soluble vitamins like vitamin A)
Typically, you can start to feel the positive effects of the IM shot, between 24 - 72 hours post injection, dependent of current levels of B12 in the body
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