This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: A.N.S., Subject name: Pharmacology
Tizanidine has action on: 
Select and explain. 
A. Alpha adrenergic, B. GABA A action, C. Gaba B action, D. Beta adrenergic
A: Alpha adrenergic
Answer: A: Alpha adrenergic 
Explanation: Ans. a. Alpha adrenergicRef: Goodman Gilman 13th E/P203Alpha-2 AgonistsClonidineDexmedetomidineLofexidineMethyldopaTizanidineGuanfacineGuanabenzMoxonidineApraclonidineBrimonidine