what happens if i don't have my b12 injection Vitamin Injections: You Need To Know Vitamin B12 Deficiency - Harvard

Ensure muscle is relaxed before injection

This rapid increase has been argued to be due either to a release of IGF-1 stores in tissues or due to a proteolytic cleavage of IGFBP-3 either in the plasma or in tissue

They are considered to be safe and come with no major adverse reactions

For confirmed B12 deficiency without neurological involvement , the standard regimen comprises 1 mg hydroxocobalamin intramuscularly three times weekly for two weeks, followed by maintenance doses every two to three months for those with irreversible causes like pernicious anaemia

The limited information from studies already conducted shows it could evoke mild fatigue