Brand name(s)

Amrix, Comfort Pac with Cyclobenzaprine, Fexmid, Flexeril

What it is

Cyclobenzaprine is a muscle relaxant. It works by blocking nerve impulses (or pain sensations) that are sent to your brain.

What it treats

Cyclobenzaprine is used together with rest and physical therapy to treat skeletal muscle conditions such as pain or injury.