This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: DNB 2018, Subject name: Pharmacology
Tizanidine produces its action acting on which of the following receptors? 
Select and explain. 
A. Alpha adrenergic receptors, B. GABA A receptors, C. GABA B receptors, D. Beta adrenergic receptors
A: Alpha adrenergic receptors
Answer: A: Alpha adrenergic receptors 
Explanation: Drugs ending with "nidine" are alpha 2 agonist. Clonidine and Tizanidine are alpha 2 agonist.