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Interstitial Cystitis

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00056251
Recruitment Status : Completed
First Posted : March 10, 2003
Last Update Posted : June 24, 2005
Information provided by:
ICOS Corporation

Brief Summary:
Patients with interstitial cystitis who meet eligibility requirements will be randomized to one of four treatment arms (3 RTX, Placebo). Study drug is administered as a single instillation within the urinary bladder. Study duration is 12 weeks.

Condition or disease Intervention/treatment Phase
Interstitial Cystitis Procedure: H&P; ECG; Blood tests; voiding diary; Cystoscopy Phase 2

Detailed Description:


Topical resiniferatoxin (RTX) administrated to the bladder may be effective in decreasing the symptoms associated with interstitial cystitis through its action on pain sensing neurons.


Randomized, double-blind, placebo-controlled, Phase 2 trial to determine the safety and efficacy of RTX in patients with interstitial cystitis.

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Study Type : Interventional  (Clinical Trial)
Enrollment : 150 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double
Primary Purpose: Treatment
Official Title: A Phase 2, Randomized, Double-Blind, Placebo-Controlled Study of the Safety and Efficacy of RTX Topical Solution in Patients With Interstitial Cystitis
Study Start Date : January 2003
Study Completion Date : August 2003

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Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 70 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • ≥ 18 years of age.
  • Have IC that meets disease diagnostic criteria as defined by a history of the following:
  • Cystoscopy/hydrodistension with a diagnosis of IC confirmed by findings of Hunner's ulcer or glomerulation
  • Symptoms of bladder pain and urinary urgency for at least 6 months
  • Urinary frequency while awake at least 8 times a day while awake
  • Nocturia at least twice a night
  • Symptoms not significantly relieved by antimicrobial agents, anticholinergic drugs, or antispasmodics
  • Have IC that in the judgment of the investigator has been stable in the previous 30 days
  • Have IC-related pain despite current therapy, defined as a score of 4 or greater [(on a scale from 0 (none) to 9 (severe)] on average over the past month and confirmed by the voiding diary collected at Visit 2
  • Have at least one voided volume ≥ 75 cc in a 24 hour period, confirmed by the voiding diary collected at Visit 2
  • Patients of childbearing potential must agree to use an acceptable form of contraception (oral contraceptives, intrauterine device or double barrier methods) from Visit 1 through Visit 6
  • Provide signed informed consent

Exclusion Criteria:

  • Currently pregnant or breastfeeding
  • Presence of ulcers on the pre-treatment cystoscopy
  • Intravesical therapy or bladder hydrodistention within the previous 60 days
  • Initiation of pentosan polysulfate sodium (Elmiron®) within the previous 16 weeks
  • Use of fentanyl patches, morphine sulfate, methadone or B&O supprettes within the previous 30 days.
  • Previous augmentation cystoplasty, cystectomy or cystolysis, neurectomy (i.e., hypogastric nerve plexus ablation) or implanted peripheral nerve stimulator which has affected bladder function
  • History of ureteral reflux. Patients with a history of childhood urinary tract infections, recurrent urinary tract infections as an adult (defined as >3 culture documented episodes within the previous 12 months), or pyelonephritis at any time must have a cystourethogram to rule out ureteral reflux.
  • Evidence of renal impairment (creatinine > 2 times the upper limit of normal at Visit 1), hepatic impairment (AST or ALT > 3 times the upper limit of normal at Visit 1), clinically significant cardiovascular, respiratory, or psychiatric diseases
  • Any condition that in the judgment of the investigator would interfere with the patient's ability to provide informed consent, comply with study instructions, place the patient at increased risk, or which might confound the interpretation of the study results
  • Treatment with a drug or medical device that has not received regulatory approval within the previous 30 days
  • Investigators, study staff and their immediate families. Immediate family is defined as current spouse, parent, natural or legally adopted child (including a stepchild living in the investigator's household), grandparent, or grandchild.
  • Previously completed or withdrawn from this study
  • Urinary tract or prostatic infection within the past 3 months before study entry
  • Active genital herpes or vaginitis
  • Urethral diverticulum
  • Uterine, cervical, vaginal, or urethral cancer within the past 5 years before study entry
  • History of cyclophosphamide or chemical cystitis, urinary tuberculosis or radiation cystitis
  • History of bladder tumors (benign or malignant)

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00056251

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Sponsors and Collaborators
ICOS Corporation
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Study Director: Lyn Frumkin, M.D., Ph.D. ICOS Corporation, (425) 415-5571,
Layout table for additonal information Identifier: NCT00056251    
Other Study ID Numbers: JIC01
First Posted: March 10, 2003    Key Record Dates
Last Update Posted: June 24, 2005
Last Verified: January 2004
Keywords provided by ICOS Corporation:
Interstitial Cystitis
Additional relevant MeSH terms:
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Cystitis, Interstitial
Urinary Bladder Diseases
Urologic Diseases