Generic Flexeril is a muscle relaxant. It works by blocking nerve impulses (or pain sensations) that are sent to your brain.
Generic Flexeril is used together with rest and physical therapy to treat skeletal muscle conditions such as pain or injury.
Generic Naprosyn is used for treating rheumatoid arthritis, osteoarthritis, ankylosing spondylitis, and juvenile arthritis. It is used to treat tendonitis, bursitis, gout, menstrual cramps, or mild to moderate pain.