A client is admitted with a diagnosis of urinary calculi and is experiencing severe pain. Fentanyl 100 mcg IV is given prior to the change of shift. Which symptom is most important for the nurse to report to the next thist?

1. Nausea with a small amount of vomitus
2. Reported pain of 5 on a scale of 1 to 10
3. Change in the location and character of pain
4. Lethargy and headache.