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