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Randomized, Double-blind, Placebo-controlled, Phase 2 Trial of BEKINDA (Ondansetron 12 mg Bimodal Release Tablets) for Diarrhea Predominant Irritable Bowel Syndrome (IBS-D) (NCT02757105)

This is a randomized, double-blind, placebo-controlled, 2-arm parallel group study. After qualifying for the study and signing informed consent, patients will undergo a two-week observation period during which stool consistency and frequency data and symptom data will be collected. Patients will then be randomized 60:40 to RHB-102 12 mg (BEKINDA) or placebo. Patients will continue on treatment for 8 weeks. Each medication will be given once daily.
  • Drug: BEKINDA
    • RHB-102 12 mg
    • Ondansetron Bimodal Release Tablet 12 mg
  • Drug: Placebo
    Ages eligible for Study
    18 Years to 80 Years
    Genders eligible for Study
    All
    Accepts Healthy Volunteers
    No
    Inclusion Criteria:
    • Male and female patients age≥18 years (with a minimum of 35% males in the study)
    • Patient meets FDA guidance and Rome III criteria for IBS-D: a. Recurrent abdominal pain or discomfort over ≥6 months, with frequency ≥3 days/month in the last 3 months associated with ≥2 of the following: i. Improvement with defecation ii. Onset associated with a change in frequency of stool iii. Onset associated with a change in the form of stool b. Loose or watery stools (Bristol stool form scale 6 or 7) ≥2 days per week
    • Average worst daily pain intensity ≥3.0 for each of the two baseline weeks
    • Major laboratory parameters within the following limits (no worse than grade 1 abnormalities per NCI-CTCAE v4): a. Adequate hematologic function, as demonstrated by i. Hemoglobin ≥10 g/dL ii. ANC 1.5-10 x 10^9/L iii. Platelets ≥100 x 10^9/L b. Adequate liver and renal function as demonstrated by i. AST and ALT each ≤ 3.0 x ULN ii. Total bilirubin ≤1.5 x ULN iii. Creatinine ≤1.5 X ULN c. Euthyroid based on TSH and free T4 levels
    • Patients on thyroid hormone replacement must be on a stable dose for at least one month prior to study entry.
    • C-reactive protein ≤2 x upper limit of normal for lab
    • Patients of childbearing potential and male patients with partners of childbearing potential must utilize effective contraceptive measures Women of childbearing potential are women who have menstruated in the past 12 months, with the exception of women who have undergone surgical sterilization
    • All patients must sign informed consent.
    Exclusion Criteria:
    • Evidence of other cause for bowel disease:
    • Relevant abnormalities seen on colonoscopy if previously performed or if required per this protocol. These include but are not limited to Crohn's disease, ulcerative colitis, diverticulitis, ischemic colitis, microscopic colitis.
    • History of and/or positive serologic test for celiac disease
    • Known or suspected lactose intolerance.
    • History of abdominal surgery other than appendectomy or cholecystectomy at any time
    • Any elective major surgery (of any organ) planned for the period of the study, including follow-up
    • History of organic abnormalities of the GI tract including but not limited to intestinal obstruction, stricture, toxic megacolon, GI perforation, fecal impaction, gastric banding, adhesions or impaired intestinal circulation (e.g., aortoiliac disease)
    • Current or previous diagnosis of neoplasia (except non-GI neoplasia in complete remission ≥5 years, squamous and basal cell carcinomas). With approval of the medical monitor patients with curatively treated neoplasm in complete remission <5 years may be entered in the study.
    • Patients with a history of positive tests for ova or parasites or Clostridium difficile must be retested during the screening period and tests for the relevant agents must be negative
    • Use of any 5-HT3 antagonist within 4 weeks of the start of baseline data collection.
    • Use of rifaximin within 4 months of the start of baseline data collection.
    • Use of any other agent specific for IBS (such as alosetron or eluxadoline) or for symptomatic treatment of IBS (such as antispasmotics and antidiarrheals other than loperamide) within 2 weeks of the start of baseline data collection.
    • Uses of any investigational agent for any indication within 4 weeks of the start of baseline data collection.
    • Congestive heart failure, bradyarrhythmia (baseline pulse<55/min), known long QT syndrome
    • Patients who have QTc prolongation>450 msec noted on screening ECG, or who are taking medication known to cause QT prolongation Note: For current list of medications known to cause QT prolongation see: https://www.crediblemeds.org/healthcare-providers/drug-list/ There are several risk categories. Use the list showing those drugs known to cause torsade de pointes (TdP)
    • Hypersensitivity or other known intolerance to ondansetron or other 5-HT3 antagonists
    • Patient has taken apomorphine within 24 hours of screening
    • Pregnant or lactating
    • Patients with other major illnesses, either physical or psychiatric, or social situations which may interfere with participation in the study or interpretation of results
    • Patients with severe hepatic impairment, defined as Child-Pugh score ≥10 at baseline
    All patients will undergo baseline evaluation including full history and physical, with particular attention to gastrointestinal symptomatology and findings, a standard set of safety laboratory examinations (CBC and platelet count, biochemical profile, urinalysis, serum TSH and free T4, INR), and 12-lead ECG. In addition, the following studies will be performed to exclude other causes of gastrointestinal symptoms:

    - Serum testing for C-reactive protein and gluten sensitivity

    - Colonoscopy if required per protocol

    - Patients with a history of positive tests for ova, parasites or Clostridium difficile must undergo repeat testing, which must be negative, during the screening period. Starting during the baseline observation phase, all patients will keep diaries of symptomatology and stool frequency and consistency. Stool consistency will be assessed according to the Bristol Stool Form scale (Lewis and Heaton, 1997).

    Patients will keep diaries of stool frequency and consistency, symptoms, study medication compliance, and use of all medications, including rescue medications, throughout the study.

    Serum electrolyte assays (bicarbonate, calcium, chloride, magnesium, potassium, and sodium) will be performed at week 3 on study. Safety laboratory examinations will be performed during and after the treatment period in accordance with the study procedures schedule below.

    Patients will be questioned periodically regarding concomitant medication use and the occurrence of adverse events.

    Patients must complete at least 12 days of all baseline diary entries within the 14 day screening period to be eligible to participate in the study. Patients completing fewer than 12 days of diary entries may, at the investigator's discretion, repeat the screening period diary. As long as the patent can complete and enter the study within 6 weeks, baseline laboratory studies need not be repeated. If repeating the 2 weeks' baseline diary will result in a period longer than 6 weeks from consent to start of treatment, the medical monitor must be consulted prior to randomization.

    13 locations

    United States (13)
    • Endoscoopy Center of AR
      Not specified
      Little Rock, Arkansas, United States, 72212
    • Arkansas Gastroenterology, P.A.
      Not specified
      North Little Rock, Arkansas, United States, 72117
    • Prx Clinical
      Not specified
      Garden Grove, California, United States, 92840
    • Providence Clinical Research
      Not specified
      North Hollywood, California, United States, 91606
    • Shahram Jacobs MD, Inc.
      Not specified
      Sherman Oaks, California, United States, 91403
    • Advanced Rx Clinical Research Group, Inc.
      Not specified
      Westminster, California, United States, 92683
    • Bristol Hospital Dba Connecticut Gastroenterology Institute
      Not specified
      Bristol, Connecticut, United States, 06010
    • PMG Research of Winston-Salem
      Not specified
      Winston-Salem, North Carolina, United States, 27103
    • Great Lakes Medical Research
      Not specified
      Mentor, Ohio, United States, 44060
    • Clinsearch
      Not specified
      Chattanooga, Tennessee, United States, 37421
    • New Phase Research & Development
      Not specified
      Knoxville, Tennessee, United States, 37909
    • Aztec Medical Research, LLC
      Not specified
      Channelview, Texas, United States, 77530
    • Gastroenterology Research of San Antonio
      Not specified
      San Antonio, Texas, United States, 78229
    Status:
    unknown
    Type:
    Interventional
    Phase:
    Start:
    18 May, 2016
    Updated:
    14 January, 2018
    Participants:
    120
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