9 Getting a B12 Shot Earlier in the Day Will Decrease the Chance of Insomnia B12 shots do not contain any stimulants , but depending on how sensitive you are, getting the shot in the evening may lead to vivid dreams or insomnia
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What are the signs that B12 is working
However, in a small number of cases, individuals using Neurobion may experience nausea, abdominal discomfort, diarrhea, or allergic reactions such as rashes, hives, itching, redness, blistering, and peeling skin
Common vitamin b12 injection side effects include pain or swelling at the injection site, mild diarrhea, and itching