A 10-year old male is 24 hours postappendectomy. He is awake, alert, and oriented. He tells the nurse that he is experiencing pain. He has a prescription for morphine 1 to 2 mg PRN pain. What is the...

A 10-year old male is 24 hours postappendectomy. He is awake, alert, and oriented. He tells the nurse that he is experiencing pain. He has a prescription for morphine 1 to 2 mg PRN pain. What is the priority nursing action in managing the child's pain?

1. Change the child's position in bed.

2. Obtain vital signs with a pain score.

3. Administer 1 mg morphine as prescribed.

4. Perform a head to toe assessment.