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However, in very rare cases, some people can experience side effects caused by allergic reactions or sensitivity ( If you experience any side effects, speak with your doctor
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
They also check Vitamin B12 levels and how the patient is doing to adjust the treatment as needed
At first, higher doses are used to quickly fill up vitamin B12 stores
