Before using this product, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details. Do not concomitantly use disinfectants containing quaternary ammonium salts for skin preparation because hyaluronic acid can precipitate in their presence. The vial/syringe is intended for single use. The contents of the vial must be used immediately once the container has been opened. Discard any unused solution. Inject the full 2 mL in one knee only. If treatment is bilateral, a separate vial should be used for each knee.