feel sick after b12 injection Shots at Home: How, Where & How Often to Inject Yourself Vitamin B12 Side Effects

26 Comparison with existing literature To the authors knowledge, this is the first large survey examining perceived quality and safety in primary care for people with vitamin B12 deficiency/pernicious anaemia

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However, some patients receiving high-dose B12 supplementation or injections may experience adverse reactions, though these relate to the treatment rather than the elevated levels: Possible reactions to B12 supplementation (particularly injections): Skin reactions, including acneiform eruptions or rashes Pruritus (itching) Injection site reactions (with parenteral administration) Rare hypersensitivity reactions Non-specific symptoms such as headaches, dizziness, or gastrointestinal disturbances have been reported by some patients taking B12 supplements, but causality is not well established in clinical evidence

B12 Shots Are Safe, but Keep an Eye Out for These Mild Side Effects Knowledge is always power