Some common side effects of B12 shots include mild soreness where you got the injection, feeling dizzy, or having a headache
Cyanocobalamin Dosage, Concentration, Route of Administration Dosage : Seek advice from a licensed physician, medical director, or other healthcare provider Concentration : 2mg/ml Route of Administration : IM/Sub-Q Resources: Precautions/Side Effects Before taking, make sure to tell your healthcare provider about any allergies to this, cobalt, or any form of vitamin B12
However, its essential to remember that B12 injections are not a permanent solution for B12 deficiency
With a severe deficiency, it can honestly take months of maintenance shots before you feel completely better again
[15] In practice, hydroxocobalamin injections achieve higher and more sustained vitamin B concentrations compared to cyanocobalamin