Older adults usually get the same dose as younger people, but need more watching for side effects
An experienced neurosurgeon or pain-intervention specialist can usually estimate which risks are most relevant for a particular patient by reviewing the pain distribution, imaging, medications, previous procedures, and the planned needle path, although no complication can be predicted with complete certainty
doi:10.1186/s12970-018-0247-6 Sikiric P, Drmic D, Sever M, et al
Released against published specifications, with an independent third-party certificate of analysis tied to the lot you receive
If your doctor feels you're a good candidate for vitamin B12 injections, they'll give you a prescription for a certain dosage