how long does your arm hurt after a b12 injection Do Injections Hurt? Painful Shots Tips · PA Relief B12 Shots Side Effects And

(November 2016)

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Common side effects include, but may not be limited to: pain or redness at the injection site mild diarrhea pruritus (itching) increased swelling joint pain dizziness headache nervousness or anxiety Serious side effects may include: allergic reactions peripheral vascular thrombosis hypokalemia (low potassium levels) pulmonary edema (fluid build-up around or in the lungs) thrombocytosis congestive heart failure There have been reports of anaphylactic shock and death after the parenteral administration of vitamin B12

Common Signs of Low B12 Not sure whether a shot makes sense