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
In case of spasticity, the drug not used is : 
Select and explain. 
A. Diazepam, B. Baclofen, C. Tizanidine, D. Amitryptiline
D: Amitryptiline
Answer: D: Amitryptiline 
Explanation: None