A nurse is reinforcing teaching with an adolescent who has a new prescription for cefazolin. For which of the following findings should the nurse instruct the adolescent to monitor and report to the provider?

A. Constipation: Constipation is not a common adverse effect of cefazolin. While gastrointestinal disturbances such as diarrhea or nausea can occur with antibiotics, constipation is typically unrelated and does not require immediate reporting. B. Elevated skin patches: Skin eruptions, including hives or elevated erythematous patches, may indicate an allergic reaction to cefazolin. Early recognition and reporting are critical to prevent progression to severe hypersensitivity reactions such as anaphylaxis. C. Ringing in the ears: Ototoxicity is more commonly associated with aminoglycoside antibiotics, not cefazolin, which is a cephalosporin. Tinnitus would not be an expected adverse effect requiring urgent reporting in this context. D. Depression: Cefazolin is not linked to mood changes or psychiatric effects. Monitoring for depression is unnecessary in this case, as it is unrelated to the medication’s known adverse effects.