The nurse is planning education for a client who is prescribed guaifenesin for a sinus infection. Which instruction should the nurse plan to include in the client's education?

A. Report clear-colored sputum to the provider: Clear-colored sputum is typically normal and not an indication of infection or complication. The client does not need to report it unless accompanied by other concerning symptoms. B. Increase your oral fluid intake: Guaifenesin is an expectorant that works by thinning and loosening mucus in the airways. Increasing fluid intake helps optimize its effectiveness, making coughs more productive and facilitating mucus clearance. C. Report symptoms that last longer than 2 days: Symptoms of a sinus infection often last longer than two days, and short-duration monitoring is insufficient. Clients are usually advised to report persistent or worsening symptoms after about 7–10 days, so this instruction is inaccurate. D. This medication will stop your cough: Guaifenesin does not suppress cough; instead, it loosens mucus to make coughing more productive. Telling the client it will stop their cough could lead to misunderstanding of the medication’s purpose and effectiveness.