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: pulmonary edema peripheral vascular thrombosis, which involves blood clots polycythemia vera, which is a type of blood cancer If anyone experiences difficulty breathing, hives, and swelling, they need emergency medical help
B12 injections are especially effective, as they provide direct absorption for optimal immune function
And if you have heart or kidney conditions, a conversation with your doctor before starting B12 therapy is essential
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Some small studies suggest B12 (especially with B6) may reduce nausea, though more research is needed [*]
Key Takeaways For a lot of people, the first noticeable bump in energy shows up somewhere in the one-to-three-day stretch after the injection
