what are side effects of b12 injections Vitamin Injections: You Need To Know Vitamin B12 shots: Uses, benefits,

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If its due to altitude, rest, drink water, and drink coca tea

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This article examines the side effect profile of B12 therapy in older adults, covering common reactions such as injection site discomfort and gastrointestinal symptoms, rare serious adverse events requiring urgent medical attention, important drug interactions with medications like proton pump inhibitors and metformin, and evidence-based dosing guidance aligned with NICE and BNF recommendations for safe, effective B12 replacement in this vulnerable population