A client with a prescription for morphine sulfate 2 mg IV every 4 hours PRN for pain reports the pain is a 10 on a 0 to 10 scale one hour after receiving the last administration. Which intervention should the nurse implement?

Contact the healthcare provider about the frequency of pain medication.

Administer an additional dose of morphine sulfate 2 mg IV.

Review the medical record for additional pain medication prescriptions.

Encourage the client to allow more time for the medication to work.