Final answer:
In addition to administering ibuprofen, the nurse should provide comfort measures, monitor for side effects, and reassess the child regularly.
Step-by-step explanation:
When a nurse administers ibuprofen (Motrin) to a child with a temperature of 38.8° C (102° F), in addition to monitoring the child's temperature and ensuring they stay hydrated, the nurse should also take action to provide comfort measures and monitor for any side effects of the medication. These measures can help reduce the child's discomfort and support recovery. It is important to reassess the child regularly to determine if additional interventions, such as sponging with tepid water if the fever doesn't decrease, are necessary and to ensure that the fever is not indicative of a more serious underlying condition.