Had no side effects
For example, those with Crohns disease or after gastric bypass might not absorb Vitamin B12 well
Post-injection care is straightforward: Stay hydrated for the remainder of the day Avoid rubbing or massaging the injection site aggressively Apply a cold compress if swelling or soreness develops at the injection site Monitor for signs of allergic reaction (hives, difficulty breathing, dizziness) for at least 30 minutes Contact your provider or seek emergency care if you experience chest tightness, significant swelling, or breathing difficulty Strenuous exercise can resume the same day for most patients, though some prefer to wait until the following morning if injection-site soreness is noticeable
The treatment, in this case, usually follows by means of having daily injections for a week or so, then injections every few days for a month, after which maintenance doses are usually given every one to two months for life
Vitamin B12 injections cost significantly more than oral supplements
This includes people with kidney and liver disease, those with diseases related to the blood, and women who are pregnant