When prescribed and monitored properly, vitamin B12 injections are safe and effective
Anyone with these conditions should obtain explicit medical clearance before receiving a B12 injection
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These combination injections are often used to address multiple deficiencies simultaneously and can provide additional benefits, such as improved metabolism and nerve function
22 May 2026 6 min Why do I feel worse after my B12 injection
[15] [16] Standard NHS treatment protocols: Without neurological involvement: Hydroxocobalamin 1mg intramuscularly three times weekly for two weeks, then maintenance injections every 2-3 months (lifelong if pernicious anaemia)