A patient presents with abdominal pain, diarrhea, and a history of recent antibiotic use. Which nursing intervention is most appropriate to address the suspected diagnosis of antibiotic-associated diarrhea?

Choice A reason: Instructing a patient to discontinue all medications is outside the nursing scope of practice and potentially dangerous. If the patient is taking essential medications for chronic conditions, abrupt cessation could lead to severe rebound effects or worsening of the underlying illness for which the antibiotics were originally prescribed. Choice B reason: Diarrhea, especially when potentially caused by Clostridioides difficile secondary to antibiotic use, leads to rapid loss of water and electrolytes. Assessing skin turgor, mucous membranes, and vital signs, while replacing lost fluids, is a fundamental nursing priority to prevent dehydration, hypovolemia, and electrolyte imbalances like hypokalemia. Choice C reason: A high fiber diet is generally contraindicated during an acute episode of diarrhea. Fiber adds bulk and can stimulate peristalsis, potentially worsening the frequency of bowel movements and abdominal cramping. Patients are typically placed on a low-residue or bland diet until the intestinal mucosa has recovered. Choice D reason: Administering anti-diarrheal medications is often contraindicated in suspected infectious or antibiotic-associated diarrhea. If the cause is C. difficile, slowing intestinal motility can trap toxins within the colon, increasing the risk of toxic megacolon. A stool culture should be obtained before such medications are even considered.