Insulin Lispro subcutaneously for a patient weight 80 kg for 1 month of treatment. Daily dose of insulin is 1 Unit/kg and 60% in short acting, given 4 times per day;

Insulin Lispro subcutaneously for a patient weight 80 kg for 1 month of treatment. Daily dose of insulin is 1 Unit/kg and 60% in short acting, given 4 times per day;

ampoules in form of personal injectors (300 Units/3ml).

(I would like to figure out the number of personal injector needed for 1 month.)

My answer:

Daily dose (DD) for a 80 kg patient = 80 x 1 Unit = 80 U

60% is short acting, so DD = 60% of 80 U = (0.6 × 80) U = 48 U

Given 4 times per day, so for a single dose = 48 U/4 = 12 U

For 1 month (30 days), 30 x 48U = 1440 U

Rp. Insulin lispro in ampoules personal injectors 300 Units/3 ml

No. ??? (my teacher write is 10 but I don't understand why)

Sig. Inject subcutaneously 12 Unit (0.12 ml)

before each meal, 4 times a day for 1 month.