inject vitamin b12 intramuscular Sandoz Injectable Solution - 1000 mcg/10 mL Choosing the Right Needle and
Description
The pink color from B12 sometimes stains skin temporarily at the injection site

[DOI] [PubMed] [Google Scholar] 2.Foley R.N., Parfrey P.S., Sarnak M.J

The physician may report the infusion code for each additional hour only if the infusion interval is greater than 30 minutes beyond the 1 hour increment

Before each injection, patients should examine the solution in good lighting conditions