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Because the needle stays in the fatty layer, there is less chance of catching a nerve or a blood vessel than with a deeper injection, which is one reason some clinicians prefer it for maintenance dosing

Hospira offers products ranging from basic drug dilutions to complex infusion therapy, and provides products that meet strict safety requirements for sterile and parenteral use

Jan 2019;42(Suppl 1):S90-S102

routine B12 level monitoring is generally unnecessary once replacement is established, as levels do not reliably correlate with tissue stores Important safety considerations: Older adults may have impaired renal function, though this rarely affects B12 therapy given its wide safety margin