Table 6: Examples of Treatment Regimens for Clinical Vitamin B₁₂ Deficiency.

Varies, not limited to:

• 1 mg intramuscularly (IM) or subcutaneously (SQ) every (q) week X 8

OR

• 1 mg IM or SQ X 7 in one month

• 1 mg IM or sq q month for life

OR

• 1 mg - 2 mg orally (PO) everyday (QD) for life

Other foodbound B₁₂ malabsorption problems

Varies, not limited to:

• 1 mg IM or SQ q week x 8

OR

• 1 mg IM or SQ x 7 in one month

OR

• 1 mg-2mg PO QD

• 1 mg IM or SQ q month possibly for life

OR

• 1 mg PO QD possibly for life

• Treat underlying condition

AND

Cyanocobalamin varies, not limited to:

• 1 mg IM or SQ q week x 8

OR

• 1 mg IM or SQ x 7 in 1 month

• 1 mg IM or SQ q month

OR

• 1 mg PO QD

Treating underlying condition might resolve B₁₂ deficiency. If cyanocobalamin is d/c'd, follow up with regular assessment of metabolites