A 26 yeаr-оld presents tо the оffice complаining of аcute onset of nausea, vomiting and diarrhea since last evening. He has no significant past medical history. He is able to drink liquids but has had 3 episodes of diarrhea since this morning and has little appetite for solid foods. His vital signs are stable. Since he is in graduate school he is concerned about missing class today and wants you to prescribe something for him. He notes that he was with friends yesterday and 2 others in his group are also sick with the same symptoms. The Nurse Practitioner suspects that he has acute viral gastroenteritis. Which of the following is the most appropriate action for the Nurse Practitioner at this time?