Results are typically slower and less noticeable compared to injections
Here's an in-depth look at selecting the correct syringe size for B12 injections
Size: 1 ml x 25 Multiple dose Vials
after an intramuscular injection of 1,000 g of cyanoB 12 , about 150 g is ultimately retained in the body 15 Most vitamin B 12 -deficient individuals in the UK and other countries are treated with intramuscular vitamin B 12 , and vitamin B 12 replacement has been traditionally administered intramuscularly
Adverse reactions following intramuscular (IM) injection have included anxiety, mild transient diarrhea, ataxia, nervousness, pruritus, transitory exanthema, and a feeling of swelling of the entire body
Hydroxocobalamin: Adverse reactions (IV use)