Math and Dosage Calculations for Health Care 3rd Edition by James Whaley, Kathryn Booth, Booth Kathryn

Exercise 36

In Exercises 24, refer to the following order, label, and package insert.
Ordered: Penicillin G potassium 1 million U IM q2h
If the penicillin is reconstituted at 1200 on 11/20/05 and will be stored in the refrigerator, what expiration date and time should you write on the label?