vitamin b12 reactions to injection Feeling worse after Injection: Answering concerns Vitamin B12 Injections: Unlock Energy,
Description
Route of Administration: Given through IV (intravenous) or IM (intramuscular) injection Methylcobalamin Injection (B12) FAQs Doctors may stop B12 injections if a patients levels are stabilized, if they switch to oral supplements, or if there's no clear deficiency

This is the number one reason injection site rotation matters

Blanco M, Hernndez MT, Strauss KW, Amaya M

Because rapid correction of severe B12 deficiency can trigger a surge in bone marrow activity and red blood cell production
