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. H2receptor antagonists, protonpump inhibitors, antacids, mucosal protective agents, antiemetics, laxatives, and antidiarrheals.

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0:00 Overview
2:28 Parietal cell acid secretion
3:34 H2receptor 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