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
Aspirin produces all of the following effects except 
Select and explain. 
A. Frank gastric bleeding, B. Prolonged prothrombin time, C. Platelet dysfunction, D. Constipation
D: Constipation
Answer: D: Constipation 
Explanation: None