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Description
Also, IM is not necessary at all, as B12 has a long, documented history of effective SQ delivery

Effect of administration route on the pharmacokinetics of cobalamin in elderly patients: a randomized controlled trial

The graduated escalation schedule minimizes these risks

doi:10.1016/0002-9343(94)90149-x

Common side effects include mild soreness at the injection site or temporary warmth
