Cyclobenzaprine (Flexeril) overdose: is it the same as with a tricyclic?

According to this post (with references to back it up) at Academic Life in Emergency Medicine it's not nearly as bad. The anticholinergic toxidrome is present but not the life threatening cardiac arrhythmias or refractory seizures. (I wouldn't discount the possibility of the really nasty stuff if the OD is large).