feel sick after b12 injection Shots: Benefits, Uses, Safety, Cost & How They Work Why do I feel worse

Over time, expired B12 injections may lose their potency, meaning they might not provide the intended health benefits

For example, a patient with beta- thalassemia major felt less tired after Vitamin B12 injections

Critics of existing policy have said only babies whose mothers have hepatitis B need to be vaccinated, while supporters including the American Academy of Pediatrics note that not all women are screened for hepatitis B and giving the vaccine to all babies prevents chronic hepatitis and its complications for those who might otherwise fall through the cracks

In contrast, IM injections can be painful, and are more error-prone than injecting into fat

But as you become more accustomed to the process, you can inject B12 on your own

Jama , 302 (19), 2119-2126