Elaine, 45 years old, reports a 2-week history of nasal cong…

Elaine, 45 years old, reports a 2-week history of nasal congestion and runny nose. The NP performs a history and learns that the nasal discharge has changed from yellow to green in the past few days, accompanied by a fever of 102° F and unilateral facial pain. To treat this patient, the NP should: