what if i hit a vein injecting b12 Planning for Safer Injection B-12 Injections for Low Energy:

There is After having a B12 shot, a person should monitor for adverse symptoms and seek medical help if they experience: severe pain at the injection site mild diarrhea a swelling sensation in the body temporary itching of the skin In rare cases, a person may also be at risk of: anaphylaxis pulmonary edema congestive heart failure peripheral vascular thrombosis, which involves blood clots polycythemia vera, which is a type of blood cancer If anyone experiences difficulty breathing, hives, or swelling, they need emergency medical help

If the needle is too short for the person, or the angle is wrong, the dose can end up in subcutaneous fat, where absorption is slower and less predictable

A clinician should decide whether treatment can be reduced, changed or stopped

Then, youll need regular doses to keep B12 levels right