|  | 
 Level 4
 
 M - Musculo-skeletal systemM03 - Muscle relaxantsM03B - Muscle relaxants, centrally acting agentsM03BB - Oxazol, thiazine, and triazine derivatives
 
 M03BB02 - ChlormezanoneM03BB03 - ChlorzoxazoneM03BB52 - Chlormezanone, combinations excluding psycholepticsM03BB53 - Chlorzoxazone, combinations excluding psycholepticsM03BB72 - Chlormezanone, combinations with psycholepticsM03BB73 - Chlorzoxazone, combinations with psycholeptics
 
 
 
 | 
 
 
 |