| | | M - Musculo-Skeletal System |  |  | 
 |  | | M03 - Muscle Relaxants |  | This group comprises peripherally, centrally and directly acting muscle relaxants.See also G04BD - Drugs for urinary frequency and incontinence.
 
 | 
 |  | | M03B - Muscle Relaxants, Centrally Acting Agents |  | This group comprises centrally acting muscle relaxants. Combined preparations are classified at separate 5th levels using the corresponding 50-series (comb. excl. psycholeptics), or the 70-series (comb. with psycholeptics):The group is subdivided according to chemical structure.
 Combinations with NSAIDs (M01A), analgesics (N02B) or corticosteroids (H02A) are classified here.
 
 |  | These drugs are used in different conditions associated with pain and rigidity in the muscles, joints etc.DDDs for combination products, see list on the website atcddd.fhi.no.
 
 | 
 |  | | M03BA - Carbamic Acid Esters |  |  | 
 |  |  | 
 |