what if i hit a vein injecting b12 Happens You Inject Wrong? · PA Relief B12 Shots vs. IV Infusions:

These compounded drugs are mandated to use solely ingredients from FDA-licensed sources and undergo rigorous testing for potency, sterility, and purity

NHS.uk.

Conclusion Most people get enough vitamin B12 from their diet, but some may experience a deficiency

Its vital for many body functions

Intramuscular (IM) injections are typically administered into the arm's deltoid muscle, the vastus lateralis muscle of the thigh, or the ventrolateral muscle of the hip

These may include mild digestive changes (nausea, altered bowel movements), increased energy levels that may feel stimulating initially, mild headaches (often related to dehydration), and minor injection site reactions (redness, temporary discomfort)