This is more common in the case of vitamin B12
What can go wrong Pain, swelling and a small lump The most common outcome of a rushed or badly angled injection is local irritation: soreness, redness, a small firm lump or a bruise
Normally no, apart from an achy muscle at the injection site, which normally does not last for more than an hour or so
Each injection should contain at least 5,000 mcg of pharmaceutical-grade methylcobalamin to be effective, and most patients notice improvements in energy, sleep, and mood within weeks of starting proper B12 therapy
Subcutaneous injections are a method of administering medication just under the skin, between the fatty tissue and muscle
That is why tests like methylmalonic acid (4) tend to be much more accurate than serum B12 levels