Final answer:
The most important information for the nurse to include is that the child must complete the entire course of the prescribed antibiotic to effectively treat the infection and prevent complications of acute otitis media.
Step-by-step explanation:
The most important information for the nurse to include in the instructions to the parents of a 2-year-old child diagnosed with acute otitis media is that the child must complete the entire course of the prescribed antibiotic. Antibiotics are frequently prescribed for the treatment of acute otitis media, as it is the leading indication for antibiotic prescription. It's important for the parents to understand that completing the entire course of antibiotics is necessary to effectively treat the infection and prevent complications.