This evaluation ensures the safe administration of MIC B12 injections and helps identify any potential contraindications or risks specific to individual patients
Adverse reactions after a B12 injection may include: A feeling of tightness in the chest Anaphylaxis (difficulty breathing or swallowing) Chest pain Congestive heart failure Heart palpitations Pulmonary edema Rapid heartbeat (tachycardia) Shortness of breath Vascular thrombosis Musculoskeletal Effects Your musculoskeletal system makes up your bones, tendons, cartilage, and connective tissues
[DOI] [PubMed] [Google Scholar] 60.Deboer MD, Marks DL
Why you need vitamin B12 during pregnancy Vitamin B12 is essential for the development and function of your baby's brain and spinal cord, and for forming healthy red blood cells
But, being careful is key, mainly for those at high risk. Vitamin B12 is key for making myelin, the fatty stuff around nerve fibers
labels current as of June 2026