- Male and female adults at least 18 years of age;
- Moderate to severe interstitial cystitis, with a mean pain intensity score above a
- Less than 6 months since onset of interstitial cystitis symptoms;
- History of recurrent urinary tract infections, or genitourinary cancer;
- History of hepatitis B, C or human immunodeficiency virus (HIV);
- Use of certain drugs given into the bladder up to 1 month prior to study entry.