Flexeril Oral: Uses, Side Effects, Interactions, Pictures, Warnings & Dosing The activity of Flexeril that depresses the Central Nervous System (CNS) makes it potentially addictive and dangerous. The most common adverse reactions to cyclobenzaprine are somnolence, dry mucous membranes, dizziness, and confusion. Less commonly, tachycardia, dysarthria, disorientation, and hallucinations have been reported [2]. Stopping the […]