Final answer:
For a 14-year-old high school student with shingles, reading a story is an age-appropriate and soothing complementary therapy.
Step-by-step explanation:
Casey Alexander, a 14-year-old high school football player, has been admitted with shingles, also known as herpes zoster. This condition is caused by the varicella-zoster virus, which also causes chickenpox, and occurs when the virus is reactivated in a person who has previously had chickenpox. An appropriate age-appropriate complementary therapy to encourage the mother to participate in, after administering the prescribed analgesic, would be reading a story to her son. This activity is suitable for his age and would help pass the time in a relaxing manner while he is unable to leave his room due to isolation precautions.