Bismuth subsalicylate
Bismuth subsalicylate , sold as generic and under the brand name Pepto-Bismol , is an antacid elixir medication used to treat temporary discomforts of the stomach and gastrointestinal tract , such as nausea , heartburn , indigestion , upset stomach , and diarrhea . 
<triplet> stomach <subj> gastrointestinal tract <obj> part of