Kimmel, A
If the pain starts quickly, lasts longer than a few days, worsens instead of improving, or makes it hard to raise or use your arm, it could be a sign of something more serious than typical injection irritation
Common US Prescription Formulations In the US, doctors often prescribe vitamin B12 injections made with cyanocobalamin or hydroxocobalamin
DOI: 10.1093/qjmed/hct051 Arendt JFH et al, "Elevated vitamin B12 levels and cancer risk in UK primary care: A THIN database cohort study." Cancer Epidemiology, Biomarkers & Prevention, April 2019
Your body cant make vitamin B12, so you must get it from your diet or supplements
While drinking on a regular basis tends to raise our alcohol tolerance the perceived effects we feel when we have a certain number of drinks it doesnt mean were actually metabolizing booze faster or more efficiently