A nurse is assessing a client who has a urinary tract infection and is receiving cefaclor. The nurse should monitor the client for which of the following adverse effects of the medication?

Rationale: A. Photosensitivity: Photosensitivity is a known side effect of some antibiotics, particularly tetracyclines, but it is not commonly associated with cefaclor. The nurse should monitor for other more likely adverse effects of cefaclor. B. Blurred vision: Blurred vision is not a typical side effect of cefaclor. Although some antibiotics may cause visual disturbances, this is not commonly seen with cefaclor, and there is no evidence linking cefaclor to blurred vision. C. Diarrhea: Diarrhea is a common side effect of cefaclor, as it can disrupt the normal balance of gut bacteria. Antibiotics like cefaclor can cause gastrointestinal disturbances, including diarrhea, due to the killing of both harmful and beneficial bacteria in the intestines. D. Hypoglycemia: Hypoglycemia is not a typical side effect of cefaclor. Although some medications can lower blood sugar, cefaclor is not generally associated with causing hypoglycemia, making this less relevant for monitoring in a client receiving cefaclor.