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Safety Profile and Possible Side Effects of B12 Shots B12 injections are generally regarded as very safe

Common side effects of B12 injections These B12 effects tend to resolve on their own within a day or two: Injection site reaction, such as mild soreness, redness, or swelling Brief itching or warmth at the injection area A feeling of fullness or pressure in the muscle Mild headache or nausea shortly after the shot These reactions are typically related to the injection itself, not the vitamin

Mild Nausea or Diarrhea Some people report feeling nauseous or having mild diarrhea after getting B12 injections

mg - mcg / mL - - - rounded down to whole draws Draw Reference Enter values to estimate the syringe mark

for those with neurological involvement, 1 mg on alternate days until no further improvement