Muscle relaxants are agents which affect the musculoskeletal function which are used to relieve muscle spasms, hyperreflexia, or pain.
 
 
Recommended Resources
Compares various muscle relaxants and their efficacy in treating different conditions including spasticity caused by neurological disorder versus those caused by musculoskeletal conditions.
http://www.ncbi.nlm.nih.gov/bookshelf/br.fcgi?book=ebm&part=relaxant
Analyzes the results of muscle relaxants on those with back pain on a short term basis. Some of the medications discussed are cyclobenzaprine (Flexeril) and diazepam (Valium).
http://www.spine-health.com/treatment/pain-medication/muscle-relaxants
Describes how and why muscle relaxers work and displays information about various muscle relaxants.
http://backandneck.about.com/od/skeletalmusclerelaxers/tp/musclerelaxers.htm