Euflexxa is an intra-articular implant made of sodium hyaluronate and is suitable for easing knee pain caused by osteoarthritis. This sterile, viscous, elastic, bioresorbable gel is a product of an American company, Ferring Pharmaceuticals. The active constituents of this gel are 10mg/mL of sodium hyaluronate, 8.5mg/mL of sodium chloride, 0.56mg/mL of disodium hydrogen phosphate dodecahydrate, 0.05mg/mL of sodium dihydrogen phosphate dehydrate and water for injection. A sterilised package of this implant comes in 3-2mL preloaded syringes and a patient information leaflet. Store this fragile package in a clean and cool room (2?C to 8?C), away from light. It has a shelf life of 3 years and can be stored at room temperature (15?C to 25?C) for up to half a year.