Which administration instruction applies to sucralfate?

• A. Take with meals
• B. Take on empty stomach
• C. Take with antibiotics
• D. Take with dairy

Answer: (B)

Sucralfate works by forming a sticky barrier that coats ulcers, and this coating is best created in an acidic environment. Taking it on an empty stomach keeps the gastric pH low and allows the medication to stay in contact with the ulcer long enough to adhere properly, maximizing its protective effect. When you eat, the stomach contents buffer the acid and slow stomach emptying, which reduces the ability of sucralfate to polymerize and bind to the ulcer surface. That’s why taking it with meals is less effective. It’s also why the instruction is to take it on an empty stomach—and, in practice, to separate it from other medications by a couple of hours to avoid interactions that could further reduce absorption of other drugs.