Final answer:
The nurse should inform the client that pinpoint red spots on the skin while taking metronidazole should be reported to the healthcare provider.
Step-by-step explanation:
When educating a client prescribed metronidazole, the nurse should include the finding of pinpoint red spots on the skin as reportable to the healthcare provider. While nausea, metallic taste, and occasional diarrhea are common side effects of metronidazole, pinpoint red spots on the skin may indicate a serious reaction and should be reported immediately. It is important for the healthcare provider to assess the client's condition and determine if any changes to the medication regimen are necessary.