Final answer:
The nurse should administer the next dose of codeine at 5 p.m. This is because the medication is to be taken every 4 hours.
Step-by-step explanation:
Codeine is an opioid analgesic medication used for the treatment of pain and cough. It is often prescribed in combination with other medications, such as acetaminophen or ibuprofen.
The nurse should administer the next dose of codeine at 5 p.m. This is because the medication is to be taken every 4 hours, and the client last received it at 1 p.m. Therefore, the next dose should be given at 5 p.m., which is 4 hours after the previous dose.