Yield of Diagnostic Tests and Effects of Crofelemer for Chronic Idiopathic Diarrhea In Non-HIV Patients

  • End date
    Apr 1, 2022
  • participants needed
  • sponsor
    The University of Texas Health Science Center, Houston
Updated on 26 January 2021


The purpose of this study is to evaluate the effectiveness of the drug Crofelemer in the treatment of non-HIV patients with chronic idiopathic diarrhea; to determine the prevalence of identifiable causes of chronic diarrhea in a non-HIV patients; to assess the diagnostic yield, in terms of identification of treatable etiologies, of commercially available diagnostic evaluations in adult, non-HIV patients with chronic idiopathic diarrhea, that is, evaluate which tests, among the standard diagnostic tests commonly conducted as part of the evaluation of chronic idiopathic diarrhea, are most likely to identify a treatable cause of the diarrhea; and to analyze the relationship between chronic idiopathic diarrhea and health-related quality of life and assess the impact of crofelemer treatment on health-related quality of life.

Condition Chronic Diarrhea of Unknown Origin
Treatment Crofelemer, Diagnostic tests for cause of chronic diarrhea
Clinical Study IdentifierNCT03898856
SponsorThe University of Texas Health Science Center, Houston
Last Modified on26 January 2021


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Inclusion Criteria

Is your age between 18 yrs and 75 yrs?
Gender: Male or Female
Do you have any of these conditions: Do you have Chronic Diarrhea of Unknown Origin??
Patients with chronic diarrhea (defined as 3 non-bloody loose stools per day or more than 20 non-bloody loose stools per week for more 4 weeks) and Bristol Stool Form Scale for stool consistency of 6/7 with >50% stool without an obvious cause after evaluation for organic etiologies
Patients from any ethnicity

Exclusion Criteria

Hematochezia (potentially related to an organic cause)
Subjects less than 18 years of age more than 75 years of age (safety and effectiveness of crofelemer has not been established in these age groups)
Pregnant females (crofelemer is a Category C drug due to lack of well-controlled studies to study its effects in this population)
Lactating females (it is unknown if crofelemer is excreted in the human milk and thus may have unknown adverse effects on the nursing infants)
HIV positive individuals
Persons within ability to provide consent and understand the study
Persons with history of alcohol abuse or binge drinking
Persons with history of surgical bowel resection or bariatric surgery in the past 12 months
Persons who have undergone cholecystectomy (open or laparoscopic) in the past 3 months
Persons receiving antibiotics currently or have received antimicrobials in the past 4 weeks
Persons with end-organ failures including end-stage renal disease, end-stage liver disease, or severe heart failure
Persons with metastatic hematologic and oncologic malignancies
Persons receiving chemo-radiation or immune-modulators for oncologic or rheumatologic conditions
Persons with any other known organic gastrointestinal or non-gastrointestinal disease process in which diarrhea is a recognized clinical feature
Gluten free diet for previous 3 months and refusal to ingest gluten
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