Clinical trial Recruiting at 1 site Phase2; Phase3 Interventional Ages 20 and up

Treatment for radiation cystitis using pentosan polysulfate sodium

Official title: A Randomized, Controlled, Phase II/III Trial to Evaluate the Efficacy and Safety of U101 Oral Capsules in Radiation-induced Cystitis

Run by National Taiwan University Hospital · NCT05245591 · Data updated 2026-11-12

This study is testing if a medication called pentosan polysulfate sodium can help people with radiation cystitis feel better after pelvic radiation therapy.

Quick facts

PhasePhase2; Phase3
Study typeInterventional
Ages20 Years and up
SexAll
Enrollment72 (estimated)
SponsorNational Taiwan University Hospital
Academic / other
Drugs / interventionsradiation
Locations1 site (Taipei)
StatusRecruiting
StartedApril 29, 2022
Main results expectedNovember 1, 2024
Study endsNovember 1, 2029
Registry record updatedMay 4, 2022
Trial IDNCT05245591 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults aged 20 and older who have experienced radiation cystitis at least 6 months after receiving pelvic radiation therapy.

Probably not a fit

Patients with significant liver, kidney, or coagulation abnormalities, as well as those who are pregnant or breastfeeding, may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This study evaluates the efficacy and safety of pentosan polysulfate sodium (PPS) compared to a placebo in patients suffering from radiation cystitis following pelvic radiation therapy. It is a randomized controlled trial involving approximately 72 participants who will receive oral PPS for 16 weeks, with a dosage of 100 mg three times a day for the first 8 weeks, followed by 100 mg twice daily for the next 8 weeks. The trial aims to determine whether PPS can alleviate symptoms associated with radiation cystitis.

Why it matters

Potential benefit: If successful, this treatment could significantly improve the quality of life for patients suffering from radiation cystitis.

How similar studies have gone: While there have been studies on treatments for radiation cystitis, the specific use of pentosan polysulfate sodium in this context is relatively novel.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

1. Capable of giving signed informed consent, which includes compliance with the requirements and restrictions listed in the informed consent form and in the study protocol.
2. Patients must be ≥20 years of age
3. Patients must have received definitive radiation therapy for cancer in pelvic area.
4. Time from the end of radiation therapy to radiation cystitis must be longer than 6 months.
5. Radiation cystitis with lower urinary tract symptoms or hematuria.

Exclusion Criteria:

1. Abnormal liver function with indication of AST, ALT, or total bilirubin ≥ 1.5 times higher than normal
2. Abnormal renal function with serum creatinine ≥ 1.5 times higher than normal
3. Abnormal coagulation profile with PT/INR higher than normal
4. Thrombocytopenia with platelet counts \< 100,000/μL
5. Pregnant or breastfeeding, expecting to pregnancy, or positive for pregnancy test
6. Patients who have systemic inflammatory symptoms during screening period (ie, fever up to 38℃ or WBC counts \>12,000/μL)
7. Patients with known urinary tract infection within 6 months of randomization.
8. Any previous intravesical instillation within 6 months of randomization (ie, hyaluronic acid instillation)
9. Any previous hyperbaric oxygen therapy within 6 months of randomization
10. Any previous treatment with pentosan polysulfate sodium within 6 months of randomization
11. Has history of thrombocytopenia, hemophilia or bladder cancer
12. Has known history of Human Immunodeficiency Virus (HIV) or organ transplantation
13. Has known history of drug allergy to pentosan polysulfate sodium
14. Has hematuria caused by clinically active urolithiasis or urothelial carcinoma

Where it's running

  • National Taiwan University Hospital
    Taipei, Taiwan
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.