The invention provides compositions and methods useful for the treatment and/or prevention of interstitial cystitis and/or a related urinary tract condition in man or in animals. Specifically, provided are compositions specially formulated for direct instillation into the bladder and/or parenteral use in the treatment and/or prevention of interstitial cystitis. Compositions adapted for direct instillation into the bladder and/or for systemic administration are provided comprised of therapeutic amounts of: chondroitin sulfate in combination with hyaluronan (hyaluronic acid) are provided. Compositions adapted for direct instillation into the bladder and/or for systemic administration are also provided comprised of therapeutic amounts of: chondroitin sulfate, hyaluronan (hyaluronic acid) and N-acetyl D-glucosamine.