2. Subject is currently receiving or having had prior IC/PBS focused therapy on less than three (3) months stable doses. i.e. oral Pentosan Polysulfate(PPS) (Elmiron®), Amitriptyline (Elavil®), oxychlorosene (Clorpactin®), dimethyl sulfoxide (RIMSO 50™), heparin or antihistamine NOTE: Antihistamine is allowable as added treatment during course of study if for treatment of diagnosed nasal/seasonal/environmental allergy (i.e treatment other than IC) , If a subject is receiving intravesical instillations of any kind at least a two day washout must be adhered to before screening is performed. The subject must abstain from any intravesical instillation during the study.