AGATAOpen-label, Multicenter, Observational (Non-interventional) Study of Efficacy and Tolerability of Amtolmetin GuAcil in Subjects With Knee osTeoArthrosis With Dyspepsia. (AGATA)

Osteoarthritis is the most common rheumatic disease. Knee OA (KOA), gonarthrosis (GA), is characterized by high prevalence, progressive course with early disability of the subject, persistent pain syndrome for the treatment of which non-steroidal anti inflammatory drugs (NSAIDs) are actively used in clinical practice. It was revealed that NSAIDs may cause gastrointestinal adverse effects (AEs), from mild dyspepsia to bleeding and perforation as well as cardiovascular effects. Gastroprotection with misoprosol, Н2-receptor antagonists and proton pump inhibitors (PPI) is not always effective. NSAIDs with the lowest gastrointestinal toxicity with efficacy adequate to suppress joint pain is justified and reasonable. Amtolmetin guacil (AMG) is a new NSAID which proved to be the least gastrointestinally toxic in experimental studies in vivo, in vitro and in comparative clinical studies. AMG does not have selectivity towards COX-2 or NO. AMG exerts gastroprotective effect due to stimulation of capsaicin receptors (vanilloid receptors) in gastrointestinal wall. To assess tolerability of amtolmetin guacil, it is first necessary to obtain data on potential reduction of dyspeptic symptoms including in subjects with these signs of NSAIDs intolerability.