Efficiency and Usability of the Iontophoretic Patch Feeligreen Diclofenac in Treating Acute Osteoarthritic Knee Pain

Inclusion Criteria: * Patients with age above 70 years, * Having a knee Arthritis (unilateral or bilateral) for at least 6 months, * Pain intensity ≥ 40 mm on a visual analog scale (VAS) * Lack of analgesic treatment or analgesic, Exclusion Criteria: * Cognitive disorders : moderate to severe stage or not allowing an understanding of the VAS (as determined by the clinician) * A history of chronic inflammatory rheumatic disease, * Diagnosis of osteoarthritis of secondary origin, * Non-steroidal anti-inflammatory medication within 7 days prior to inclusion, * Diagnosis of severe hepatic and renal insufficiency, gastrointestinal bleeding, severe heart failure, * Allergy to diclofenac or similar activity substances such as other NSAIDs, aspirin, excipients, * Damaged skin