A client is using an over-the-counter nasal spray containing pseudoephedrine to treat allergic rhinitis. Which instruction about this medication would be most appropriate for the nurse to provide for...

A client is using an over-the-counter nasal spray containing pseudoephedrine to treat allergic rhinitis. Which instruction about this medication would be most appropriate for the nurse to provide for the client?

1. Prolonged use of nasal spray can lead to nasal infections.

2. Pseudoephedrine is an addictive drug and must be used cautiously.

3. Overuse of pseudoephedrine can lead to increased nasal congestion.

4. A common side effect of pseudoephedrine nasal spray is thrush.