The home health practical nurse (PN) visits a young male client with AIDS who has Kaposi's sarcoma and peripheral neuropathies. His parents, who provide care for the client, report that their son sleeps most of the time. The PN observes the client is semi-conscious with stable vital signs and cries out in pain when turned or moved. A fentanyl patch is in place and skin lesions are closed and dried. Which intervention should the PN implement?