The health risks are too high to be negligent
Cyanocobalamin, whilst still used in some settings, is cleared from the body more rapidly, typically requiring more frequent administration
Ilg W, Synofzik M, Brotz D, Burkard S, Giese MA, Schols L
When every NATO summit convenes amid fears that its strongest member will blow it all up and withdraw and then ends with a collective sigh of relief that this outcome was averted, its hardly a reassuring sign of strategic alignment or shared values
To be extra safe, switch to a different arm or part of your body to prevent a particular vein from developing a lot of scar tissue (or even collapsing)