Snapshot A 40-year-old woman presents to her primary care doctor for diarrhea that started last night. She denies having eaten any bad foods, and no one around her was sick with the same symptoms. However, she did have a meal with raw oysters 2 nights ago but reports that “the restaurant is always so clean.” She reports having recently had a urinary tract infection and is currently taking antibiotics for it. She notes that the diarrhea started soon after starting her antibiotics. Her vital signs are within normal limits and her routine laboratory testing is normal as well. She is started on loperamide. Introduction Drugs login to view 1 more bullet Mechanism of action login to view 4 more bullets Clinical use login to view 1 more bullet Adverse effects login to view 4 more bullets