Gastrointestinal (GI) diseases are those that affect any section of the gastrointestinal tract. There are many different types of GI diseases including gastroesophageal reflux disease (GERD), peptic ulcers, nausea & vomiting, constipation, and diarrhea. This pharmacology lecture discusses mechanism of action of various drugs used in treatment of GI illnesses i.e. H2-receptor antagonists, proton-pump inhibitors, antacids, mucosal protective agents, antiemetics, laxatives, and antidiarrheals.

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0:00 Overview
2:28 Parietal cell acid secretion
3:34 H2-receptor antagonists
4:04 Proton pump inhibitors
4:50 Antacids
5:42 Mucosal protectants
7:21 Nausea and vomiting
8:11 Antiemetics
10:33 Laxatives
12:28 Antidiarrheals