DOSAGE AND DIRECTIONS FOR USE:
Administered intramuscularly.
In the absence of neurological involvement, cyanocobalamin may be administered in doses of 250 to 1000 micrograms intramuscularly on alternate days for 1 to 2 weeks, then 250 micrograms weekly until the blood count returns to normal. Maintenance doses of 1000 micrograms are administered monthly.
If there is neurological involvement, cyanocobalamin may be given in doses of 1000 micrograms on alternate days and continued for as long as improvement occurs.
For the prophylaxis of anaemia associated with vitamin B12 deficiency resulting from gastrectomy or malabsorption syndromes cyanocobalamin may be given in doses of 250 to 1000 micrograms intramuscularly each month.