can vitamin b12 injection cause fever Injections: Good or Bad? Common Mistakes in B12 Injections

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Most patients see results the very next or second day after receiving their B12 shots, with improvements including boosted energy, clearer thoughts, and better sleep

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Key safety considerations include: Infection risk : Any injection carries risk of infection if proper aseptic technique is not followed Allergic reactions : Multiple ingredients increase the potential for hypersensitivity Undiagnosed conditions : Self-administration or private clinic use may delay diagnosis of underlying medical conditions Pregnancy and breastfeeding : Safety data for lipotropic formulations in pregnancy is lacking Call 999 immediately if you experience signs of anaphylaxis (difficulty breathing, facial/tongue swelling, collapse) after an injection

The choice depends on the patients health, how bad the deficiency is, and the doctors advice