why does my arm hurt after b12 injection Vitamin Sites: All You Need to Know Shoulder Pain After Vaccination: When

For risks and side effects, read the package leaflet and ask your doctor, doctor or at your pharmacy

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There are several common locations where these injections can be administered: Upper Buttocks: This is the most common and preferred site for MIC B12 injections

Only suggestion Id have is to maybe clarify that in order to pull the medicine out in the needle you need to slightly angle it to make sure the tip of the needle is submerged into the medication, since its a shallow amount that collects at the bottom when flipped