<p><strong>Antacid action</strong>: Bismuth Subsalicylate coats ulcer surface, protecting it from acid and pepsin. It stimulates mucus and bicarbonate secretion and also reacts with HCl, produces bismuth oxychloride and salicylic acid thus reduces HCl.<br />
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<strong>Anti-diarrheal action</strong>: It stimulates absorption of water and electrolytes across the intestinal wall. In infectious diarrhea it binds with toxin produced by E.coli, disrupts cell, causing lysis of H.pylori and prevents adhesion of H.pylori in the cell wall of intestine.<br />
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<strong>Anti-inflammatory action</strong>: When hydrolyzed to salicylic acid, it inhibits prostaglandin G/H synthase &frac12;. Thus reduces inflammation and Coats the irritated tissue to retard the expulsion of fluid.</p>