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

A. Dry mouth This is not a common or concerning side effect of cefazolin. B. Constipation Not a typical or serious adverse effect of cefazolin. C. Back pain While back pain can be a side effect of some medications, it is not typically associated with cefazolin and not a first-line concern unless accompanied by other symptoms. D. Urticaria Urticaria (hives) can indicate an allergic reaction to cefazolin, which is a cephalosporin antibiotic. This requires prompt reporting and possible discontinuation of the drug.