why is vitamin b12 injection so painful Injections: Who Should Get Them and How Long Do They Last? Why do I feel worse
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Common adverse effects: Injection site reactions: Pain, redness, swelling, or bruising at the injection site are frequently reported

In these cases, elevated B12 is not the cause but a marker prompting further investigation

Desensitization protocols may offer a solution for patients who develop hypersensitivity but require ongoing vitamin B12 therapy Khatrawi2022Sajan2023Ullah2018+1 MORE
