Which client is an appropriate candidate for an antidiarrheal?

A. A client with abdominal pain of unknown origin: Antidiarrheals can mask underlying serious conditions such as appendicitis or infections. Using them without identifying the cause may worsen the condition or delay diagnosis. B. A client with noninfectious diarrhea: Noninfectious diarrhea, such as that caused by irritable bowel syndrome or medication side effects, is appropriate for antidiarrheal therapy. These agents slow intestinal motility and reduce stool frequency without interfering with the resolution of an infection. C. A client with colitis: Inflammatory bowel disease or colitis can worsen if motility is slowed, increasing the risk of toxic megacolon. Antidiarrheals are generally contraindicated in active colitis. D. A client with an intestinal obstruction: Slowing intestinal motility in a patient with obstruction can exacerbate distention, pain, and the risk of perforation. Antidiarrheals are unsafe in this scenario.