Yup, one of the infamous opiate medicines that was responsible for the overdose and death of infants back in the day. As I've said before though, back when dysentery and other illnesses were common and without cure, diarrhea and the resulting dehydration and physical weakness killed millions, and the most effective way to stop loss of fluids due to gastrointestinal discord was by temporarily paralyzing the digestive tract with opiates. It surely saved many more lives than it was responsible for taking.