A composition and a method for treatment of urinary tract dysfunction and, particularly, non-bacterial cystitis and, even more particularly, non-bacterial chronic interstitial cystitis. The composition primarily relies upon the use of a bioflavonoid and, particularly, that bioflavonoid known as quercetin. The quercetin is mixed with a proteolytic digestive enzyme protease, such as bromelin and papain, as the primary active ingredients. However, the composition may optionally and beneficially include other cystitis affecting agents, such as cranberry, as well as some other active and non-active ingredients.