- Patients using corticosteroids (oral, injectable; exception of intraarticular/soft tissue injection at the exclusion of the target knee), indomethacin, therapeutic dose of glucosamine, chondroitin sulphate or Diacerein or Avocado-Soybean Unsaponifiables (ASU) during the 12 weeks preceding inclusion (intraarticular injections of corticosteroids in the contralateral knee is allowed during the study);