what size needle for b12 im injection Dr. prescribed injections. Pharmacy only gave me vials. Where do you get your needles and syringes? size?? Where do I inject? : r/B12_Deficiency Can I use 12mm needles

Muguerza B, Castilla-Cortzar I, Garca M, Quiroga J, Santidrin S, Prieto J

188,189 Testing both serum total B 12 levels and levels of indicators of B 12 function such as methylmalonic acid, folate, and homocysteineall of which increase with B 12 deficiencymay also improve detection of deficiency

A dose of 1000 mcg daily for 6 or 7 days should be administered by intramuscular or deep subcutaneous injection

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Also megaloblastic anemia, presenting solely as pyrexia, can be found in only a small proportion of cases and is poorly characterized

Only a confirmed deficiency should lead to a prescription for B12 injections