Is your clinical instructor grading your care plan? If so, you may just want to take her advice, unless your care plan can prove to her that pain is more important than potential for electrolyte imbalances. Electrolyte maintenance is a high priority for oncology nursing, especially as imbalances can lead to cardiac dysrhythmias, seizures, etc. at their worst. However, if the patient has no other immediate risk for imbalances (vomiting, diarrhea, dehydration) or electrolytes are still WNL - the pain should take priority. Great job on those care plan ideas! The only thing is that #3 is not a risk. Any time there are aeb symptoms, it is no longer a risk, but an actual problem. :) Hope that helps!