This is why a reconstituted vial left at room temperature overnight is almost certainly compromised, while an unreconstituted vial in the same scenario retains most of its original potency
Cao WB, Harnett KM, Chen Q, Jain MK, Behar J, Biancani P
The blend ships as a 10 mg lyophilized powder in a single research vial
However, it is important to note that not all symptoms resolve completely , especially if neurological damage was severe or prolonged before treatment commenced
[20] Treatment of megaloblastic anemia with concurrent vitamin B 12 deficiency using B 12 vitamers (including cyanocobalamin), creates the possibility of hypokalemia due to increased erythropoiesis (red blood cell production) and consequent cellular uptake of potassium upon anemia resolution