Once the needle is in the muscle, the plunger is pulled back slightly to ensure the needle is not in a blood vessel
With a fresh, unused syringe, pull back on the plunger to the amount you are injecting, bringing air into the syringe
Conclusion: Optimizing Your Vitamin B12 Therapy Getting the most out of vitamin B12 therapy is key to good health
If you let it go for too long, it can cause problems in your nervous system such as: Vision problems Memory loss A pricking or numbing sensation Difficulty speaking or walking due to ataxia (loss of physical coordination) Damage to your extremities (hands, feet, arms, etc.), particularly your legs Other problems could include Infertility (this should go away with B12 treatment) Stomach cancer Bleeding and infections Damage your heart, brain, bones, and other organs in your body If you're pregnant and don't get enough vitamin B12, your baby is at risk of a serious birth defect called a neural tube defect