vitamin b12 injections vs pills The Advantages of Versus Oral Supplements: Shawn Veiseh, M.D.: Family Medicine B12 Injections or Oral B12:

Some studies have shown that cyanocobalamin may be better absorbed by the body than methylcobalamin, although the science on that topic is currently mixed

Vitamin B12 shot side effects Most people tolerate vitamin B12 injections well, but possible side effects include: Mild: soreness or redness at injection site, mild diarrhea, nausea, headache, itching Rare but serious: allergic reactions (rash, swelling, difficulty breathing), low potassium (hypokalemia), dizziness or heart rate changes Get emergency medical help if you have signs of an allergic reaction to Vitamin B12: hives

Check-in: streamlined for recurring injection patients

Medicare and private insurers may have slightly different rules

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