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: Medicine
Drug not used in treatment of Pituitary Adenoma is 
Select and explain. 
A. Octreotoid, B. Bromocriptine, C. Orlistat, D. Letrozol
C: Orlistat
Answer: C: Orlistat 
Explanation: None