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?

Instruct the patient to discontinue all medications until symptoms resolve.

Assess the patient's hydration status and provide electrolyte solutions as needed.

Encourage the patient to consume a high fiber diet.

Administer anti-diarrheal medication immediately.