Repeated USMLE Questions Step 1- 195

A 23-year-old man has been treated with cimetidine (Tagamet) for 6 months.

What is the mechanism of action of this drug?

A-Adds a protective membrane to gastric mucosa

B-Blocks the secretion of hydrochloric acid

C-Neutralizes gastric acidity

D-Stimulates H2 receptors

Answer




Cimetidine blocks H2 receptor so, it blocks the secretion of hydrochloric acid. It is H2 receptor antagonist.

The correct answer is B