a patient is prescribed lantus 30u subQ TID. how long wil on vial of insulin last.
show formula
my answer is 11.11 days
The formula would be:
Total units per day = 30u x 3 (TID) = 90u/day
Total days per vial = Total units per vial / Total units per day
Assuming a Lantus vial has 1000 units:
Total days per vial = 1000u / 90u/day = 11.11 days
Your answer is correct.