Treatment of Vitamin B12 Deficiency Anemia in Pregnancy When Total B12 Is Below 148 ng/L
This protocol applies to pregnant patients with confirmed vitamin B12 deficiency anemia where the total vitamin B12 level is below 148 ng/L — the threshold that defines clinically significant deficiency during pregnancy.
Clinical Scenario
Active pregnancy with a total vitamin B12 level below 148 ng/L. Pregnancy sets a lower diagnostic threshold than the general adult population, making prompt and appropriately selected treatment essential.
Treatment Approach
Intramuscular hydroxocobalamin is the preferred treatment in pregnancy, structured as an initial loading phase followed by a maintenance phase — the specific schedule and parameters are detailed in the full protocol.
Clinical Goals
Symptom review is recommended at one month after treatment is initiated.
References
- Total B12 <180 ng/L in pregnancy <148 ng/L
- IM hydroxocobalamin loading dose followed by the maintenance is the preferred treatment option in pregnancy.
- Symptom review is recommended in 1 month.
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