sleepy after b12 injection why do i feel tired why do i feel so tired after b12 injection Vitamin B12 Extreme tiredness after B12 inject...

Use a new sterile needle and syringe to withdraw the needed amount

Initial treatment may require multiple injections per week, followed by maintenance doses every month or as directed by your healthcare provider

Figure 2 For individuals at risk of B12 deficiency, treatment is often necessary to maintain adequate circulatory levels (22), with oral supplementation being a common approach

I think what these new vaccines are going to do is shift us into the next phase of the pandemic, where like the annual flu shot each year or season, we have to kind of predict what the virus is going to do and engineer a vaccine that is the best defense against that virus