| Hydroxocobalamin for treatment of neuralgia is classified here.Combinations with liver extract are classified at separate 5th levels using the corresponding 50-series. Combinations with folic acid are classified in this group by using the 50-series.
 Combinations indicated for symptomatic treatment of vitamin B12 deficiency are classified in B03BA51.
 Vitamin B12, see also:
 A11D - Vitamin B1, plain and in combination with vitamin B6 and B12
 A11EA - Vitamin B-complex, plain
 B03A - Iron preparations
 
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