Contact your GP if you experience: Unexpected symptoms after starting B12 supplementation, including persistent skin reactions, gastrointestinal disturbance, or mild allergic manifestations Neurological symptoms such as significant tingling, numbness, weakness, or balance problemsthese may indicate B12 deficiency paradoxically, or alternative neurological conditions requiring assessment Unexplained fatigue or malaise that develops or worsens despite supplementation Concerns about medication interactions , particularly if taking metformin, proton pump inhibitors, or other medications affecting B12 metabolism [2] [4] Seek emergency medical attention (call 999) if you develop signs of a severe allergic reaction following B12 injection, including facial swelling, difficulty breathing, or widespread urticaria
De Gruyter
For others, with milder or temporary deficiencies, the initial shots might lead to longer periods of feeling well, potentially even allowing for a switch to oral supplements under strict medical guidance
However, more research isa needed on the efficacy of vitamin B12 shots for this condition
Journal of Machine Learning Research
Recommendations for Patients on Long-Term Therapy Patients on long-term ranitidine should have their B12 levels checked regularly
