Fluid Action HA Liquid Gallon with 25 milligrams per-Ounce of Sodium Hyaluronate which promotes healthy joints. Fluid Action HA contains no pain relievers. Some other products contain ingredients for temporary pain relief that do not address the true cause of the problem. In fact, many of these pain relievers can actually make the trouble worse by breaking down cartilage. This is why Fluid Action products work on the cause and not just the symptoms.