what happens if you inject vitamin b12 into a vein wrong? B12 Injection sites + How

While the benefits of vitamin B12 are plentiful, its also possible to experience side effects from vitamin B12 shots

Inject 0.6 mL in a single weekly injection, under the skin (subcutaneously)

Book your consultation with our expert team today

Signs of a severe allergic reaction (anaphylaxis) include: Skin rash, hives, or severe itching Swelling of the face, lips, tongue, or throat Difficulty breathing or wheezing A rapid heartbeat or a sudden drop in blood pressure If you ever develop swelling of the face or throat, trouble breathing, or other signs of a severe reaction after any injection, treat it as an emergency and call 911