This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
Omeprazole effects are due to: March 2013 
Select and explain. 
A. Prostaglandin analogue, B. H, antihistamines, C. Proton pump inhibitor, D. Ulcer protective mechanism
C: Proton pump inhibitor
Answer: C: Proton pump inhibitor 
Explanation: Ans. C i.e. Proton pump inhibitor Omeprazole It is a proton pump inhibitor used in the treatment of: - Dyspepsia, - Peptic ulcer disease (PUD), - Gastroesophageal reflux disease (GORD/GERD), - Laryngopharyngeal reflux (LPR) and - Zollinger-Ellison syndrome.