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vitamin b12 injection site pain How to self-inject intramuscular - Overview How to Inject Vitamin B12
Description
See Supplementary Table 1 for additional detail

Serious reactions are rare, but you should seek medical advice if you experience any unexpected symptoms after treatment.

W.et al (2017)

Funaro A, De Monte LB, Dianzani U, Forni M, Malavasi F
