What important instruction should the nurse give to a client prescribed atenolol?

The instruction to "Report any wheezing or shortness of breath to the healthcare provider" is crucial for a client prescribed atenolol, a beta-blocker primarily used to manage hypertension and certain heart conditions. Beta-blockers can lead to bronchoconstriction, especially in susceptible individuals or those with a history of asthma or respiratory issues. Therefore, any respiratory symptoms like wheezing or shortness of breath could indicate an adverse effect that requires medical attention. Monitoring these symptoms helps ensure patient safety and allows for timely interventions if necessary.

The other options do not address the critical safety concerns associated with atenolol. It's not necessary to increase salt intake while taking this medication, as it could counteract the effects of the drug on blood pressure. Sudden discontinuation of atenolol can lead to rebound hypertension or angina, which is why patients should be advised to follow a tapering schedule if discontinuation is needed. Additionally, avoiding dairy products is not a requirement with atenolol and does not align with standard dietary guidelines for this medication. The focus on respiratory monitoring is more pertinent for patient management and safety.