| M - Musculo-Skeletal System |  |   |  
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| M09 - Other Drugs for Disorders Of The Musculo-Skeletal System |  |   |  
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| M09A - Other Drugs for Disorders Of The Musculo-Skeletal System |  This group comprises preparations used in disorders of the musculo-skeletal system, which cannot be classified in the preceding groups. 
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| M09AX - Other Drugs for Disorders Of The Musculo-Skeletal System |  Hyaluronic acid injection for intraarticular administration (e.g. 2.5 mg/ampoule) used in the treatment of arthritis is classified in this group. Hyaluronic acid injection used during surgical procedures on the eye (e.g. 4-20 mg/ampoule) is classified in S01K. Mexiletine indicated for myotonic disorders is classified in C01BB. 
  |  The DDD for hyaluronic acid is based on intraarticular treatment of arthritis. The DDD is assigned according to daily dose even if the product is given as weekly injections. 
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