for people ages 18-70 (full criteria)
at Orange, California and other locations
study started
estimated completion



The aim of this study is to assess whether IW-3300 is safe and works for the treatment of interstitial cystitis/bladder pain syndrome (IC/BPS). The main question the study aims to answer is whether IW-3300 helps bladder pain and other symptoms (for example, bladder burning, pressure and discomfort). Subjects will be assigned to receive either the study drug or placebo by chance.

Official Title

Phase 2 Randomized, Double-blind, Placebo-controlled Study to Evaluate the Efficacy, Safety, and Tolerability of 2 Dose Levels of IW-3300 to Treat Bladder Pain in Subjects With Interstitial Cystitis/Bladder Pain Syndrome


This is a Phase 2, randomized, placebo-controlled, parallel-assignment, 12-week, adaptive design study to evaluate the efficacy, safety, and tolerability of IW-3300 in subjects with IC/BPS. Subjects will be randomized 1:1:1 to IW-3300 100 µg, IW-3300 300 µg, or matching placebo administered as a rectal foam. The study has 4 periods, which are the screening (up to 30 days), pretreatment (up to 21 days), study treatment (12 weeks), and follow-up periods (2 weeks) which consists of 7 onsite study visits and 1 follow-up phone call. Subjects will administer the study drug at home for 12 weeks.


Interstitial Cystitis, Bladder Pain Syndrome, Cystitis, Syndrome, Somatoform Disorders, IW-3300 rectal foam


You can join if…

Open to people ages 18-70

  • Diagnosed with IC/BPS by a urologist or other clinician specializing in IC/BPS
  • Chronic bladder pain associated with filling the bladder over the past 6 months
  • Compliant with eDiary completion and meets weekly average daily score for bladder pain at its worst during the pretreatment period
  • Has at least 1 of the following urinary symptoms over the past 6 months: nocturia ≥2 voids/night, daytime frequency >8×day, urgency
  • Body mass index (BMI) ≤40 kg/m2
  • Willing to use a rectally administered product once daily for 12 weeks

You CAN'T join if...

  • Male subject has history of bacterial prostatitis or benign prostatic hyperplasia
  • Has a condition that can be a contraindication to using a rectal foam
  • Has cancer under active treatment or a history of uterine, cervical, pelvic, rectal, ovarian, or vaginal cancer
  • Has a history of benign or malignant bladder tumors
  • Has an active urinary tract infection or had ≥2 UTIs within the past 90 days
  • Has an uncontrolled major psychiatric condition or has made a suicide attempt during the past 2 years
  • Has a malabsorption syndrome
  • Had surgery in the pelvic or abdominal region within the past 90 days
  • Has received a cystoscopy (with or without hydrodistension for reason other than pain relief) for diagnostic purposes within the past 30 days or a cystoscopy involving therapeutic hydrodistension (for pain relief) within the past 90 days
  • Has history of pelvic irradiation or radiation cystitis
  • Has a recent history of drug or alcohol abuse


  • UCI Health accepting new patients
    Orange California 92868 United States
  • Tri Valley Urology Medical Group accepting new patients
    Murrieta California 92562 United States


accepting new patients
Start Date
Completion Date
Ironwood Pharmaceuticals, Inc.
Phase 2 Interstitial Cystitis Research Study
Study Type
Expecting 300 study participants
Last Updated