Fatigue is a common issue
Some uncommon side effects that could occur are some weakness, nausea, bowel problems, dizziness, lethargy, weight loss, thirst, nervous irritability, itchy skin, frequent urination, high levels of calcium
Step 2: Prepare Injection Site Clean the selected injection site with an alcohol prep pad using a circular motion from center outward
If the patient is suspected to be sensitive to cobalt or other components of cobalamin, an intradermal test dose is recommended.[12][15] Several laboratory tests should be performed prior to treatment with cyanocobalamin, including serum vitamin B12, folate, iron, hematocrit, and reticulocyte count
A severe cobalamin-deficiency neuropathy may result in "floppy infant" syndrome (210)
The most common is slight redness, swelling, or tenderness at the injection site, which usually resolves quickly