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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
4.5 Interactions with other medicines and other forms of interaction Vitamin B6 (pyridoxine) may decrease the effect of L-DOPA
FDA approval requires an application with evidence on quality, safety, and effectiveness for a specific medical use
Vitamin C Injections Vitamin C injections support immune function, collagen production, and antioxidant activity by delivering this essential nutrient directly into the bloodstream
Orphanet J Rare Dis 16 , 215 (2021)
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