Azithromycin is prescribed for a client with Chlamydia trachomatis. In providing client teaching about the medication, the nurse should emphasize the importance of reporting the onset of which symptom to the healthcare provider (HCP)?

A. Headache: Although headache can occur as a mild side effect of azithromycin, it is not typically serious or life-threatening. It does not require immediate reporting unless it is severe or associated with other concerning symptoms.B. Urinary frequency: Urinary symptoms like frequency are not common adverse effects of azithromycin. If present, they are more likely related to the underlying infection rather than the medication itself.C. Flatulence and nausea: Gastrointestinal symptoms such as nausea and flatulence are common and expected with azithromycin. They are usually mild and do not require the client to contact the healthcare provider unless they become severe or persistent.D. Yellow sclera: Yellowing of the sclera is a sign of jaundice, which could indicate liver dysfunction. Azithromycin can rarely cause hepatotoxicity, making this symptom important to report immediately to the healthcare provider for evaluation.