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
A common side effect associated with all NSAID drugs is 
Select and explain. 
A. Drowsiness, B. Gastric irritation, C. Xerostomia, D. Constipation
B: Gastric irritation
Answer: B: Gastric irritation 
Explanation: None