Chronic Administration of Diosmectite (SMECTA®) in Subjects With Chronic Diarrhoea

Study Overview
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Brief Summary
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The main purpose of this study is to assess the concentration of elemental impurities in blood and urine after chronic administration of Smecta® in subjects with chronic functional diarrhoea. For exploratory purposes, the potential effects of diosmectite on bowel microbiote composition will be investigated.

Official Title
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Assessment of Elemental Impurities Level After Chronic Administration of Diosmectite (SMECTA®) in Subjects With Chronic Diarrhoea

Conditions
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Chronic Functional Diarrhea of Unknown Origin

Intervention / Treatment
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* Drug: Diosmectite (Smecta®)


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Male or female subjects, between 18 and 60 years old inclusive, BMI between 19 and 32 kg/m2 inclusive (minimum body weight of 50 kg at screening). Functional chronic diarrhoea defined as loose or watery stools occurring in at least 75% of stools for the last 3 months (with symptom onset at least 6 months before diagnosis). Exclusion Criteria: No history of suspected organic or drug induced cause to chronic diarrhoea.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 60 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Other
Intervention Model: Single Group Assignment
Interventional Model Description: The study is interventional Phase 1 without individual benefit.
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Diosmectite (Smecta®)<br>5 weeks of diosmectite 3g, 3 times daily. | Drug: Diosmectite (Smecta®)<br> <br> |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Mean Change From Baseline in Blood Lead Levels During the Treatment Period and Post-treatment Follow-up Period | Baseline blood lead levels (BLL) were defined as the average between the available screening and pre-dose (Day-1) values. Values below the limit of detection (LOD) or below the lower limit of quantification (LLOQ) were replaced by LOD/2 or LLOQ/2 values. The absolute mean change from baseline in BLL during the treatment period is presented for the timepoints: 2 hours after the first dose, and prior to and after the second and third doses on Days 1 and 35, prior to the first dose on Days 2, 8, 15, 22 and 29, and on Day 36 in the morning. The absolute mean change from baseline in BLL during the post-treatment follow-up period is presented for the timepoints: Day 65, Day 95, and Day 125 (End of Study). | Screening and pre-dose Day -1 up to Day 125. | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Mean Change From Baseline in Blood Aluminium Concentrations During the Treatment Period and Post-treatment Follow-up Period | Baseline blood aluminium concentrations were defined as the average between the available screening and pre-dose (Day-1) values. Values below the LOD or below the LLOQ were replaced by LOD/2 or LLOQ/2 values. The absolute mean change from baseline in blood aluminium concentrations during the treatment period is presented for the timepoints: 2 hours after the first dose, and prior to and after the second and third doses on Days 1 and 35, prior to the first dose on Days 2, 8, 15, 22 and 29, and on Day 36 in the morning. The absolute mean change from baseline in blood aluminium concentrations during the post-treatment follow-up period is presented for the timepoints: Day 65, Day 95, and Day 125 (End of Study). | Screening and pre-dose Day -1 up to Day 125. | 
| Mean Change From Baseline in Blood Arsenic Concentrations During the Treatment Period and Post-treatment Follow-up Period | Baseline blood arsenic concentrations were defined as the average between the available screening and pre-dose (Day-1) values. Values below the LOD or below the LLOQ were replaced by LOD/2 or LLOQ/2 values. The absolute mean change from baseline in blood arsenic concentrations during the treatment period is presented for the timepoints: 2 hours after the first dose, and prior to and after the second and third doses on Days 1 and 35, prior to the first dose on Days 2, 8, 15, 22 and 29, and on Day 36 in the morning. The absolute mean change from baseline in blood arsenic concentrations during the post-treatment follow-up period is presented for the timepoints: Day 65, Day 95, and Day 125 (End of Study). | Screening and pre-dose Day -1 up to Day 125. | 
| Mean Change From Baseline in Blood Barium Concentrations During the Treatment Period and Post-treatment Follow-up Period | Baseline blood barium concentrations were defined as the average between the available screening and pre-dose (Day-1) values. Values below the LOD or below the LLOQ were replaced by LOD/2 or LLOQ/2 values. The absolute mean change from baseline in blood barium concentrations during the treatment period is presented for the timepoints: 2 hours after the first dose, and prior to and after the second and third doses on Days 1 and 35, prior to the first dose on Days 2, 8, 15, 22 and 29, and on Day 36 in the morning. The absolute mean change from baseline in blood barium concentrations during the post-treatment follow-up period is presented for the timepoints: Day 65, Day 95, and Day 125 (End of Study). | Screening and pre-dose Day -1 up to Day 125. | 
| Mean Change From Baseline in Blood Cadmium Concentrations During the Treatment Period and Post-treatment Follow-up Period | Baseline blood cadmium concentrations were defined as the average between the available screening and pre-dose (Day-1) values. Values below the LOD or below the LLOQ were replaced by LOD/2 or LLOQ/2 values. The absolute mean change from baseline in blood cadmium concentrations during the treatment period is presented for the timepoints: 2 hours after the first dose, and prior to and after the second and third doses on Days 1 and 35, prior to the first dose on Days 2, 8, 15, 22 and 29, and on Day 36 in the morning. The absolute mean change from baseline in blood cadmium concentrations during the post-treatment follow-up period is presented for the timepoints: Day 65, Day 95, and Day 125 (End of Study). | Screening and pre-dose Day -1 up to Day 125. | 
| Mean Change From Baseline in Blood Cobalt Concentrations During the Treatment Period and Post-treatment Follow-up Period | Baseline blood cobalt concentrations were defined as the average between the available screening and pre-dose (Day-1) values. Values below the LOD or below the LLOQ were replaced by LOD/2 or LLOQ/2 values. The absolute mean change from baseline in blood cobalt concentrations during the treatment period is presented for the timepoints: 2 hours after the first dose, and prior to and after the second and third doses on Days 1 and 35, prior to the first dose on Days 2, 8, 15, 22 and 29, and on Day 36 in the morning. The absolute mean change from baseline in blood cobalt concentrations during the post-treatment follow-up period is presented for the timepoints: Day 65, Day 95, and Day 125 (End of Study). | Screening and pre-dose Day -1 up to Day 125. | 
| Mean Change From Baseline in Blood Mercury Concentrations During the Treatment Period and Post-treatment Follow-up Period | Baseline blood mercury concentrations were defined as the average between the available screening and pre-dose (Day-1) values. Values below the LOD or below the LLOQ were replaced by LOD/2 or LLOQ/2 values. The absolute mean change from baseline in blood mercury concentrations during the treatment period is presented for the timepoints: 2 hours after the first dose, and prior to and after the second and third doses on Days 1 and 35, prior to the first dose on Days 2, 8, 15, 22 and 29, and on Day 36 in the morning. The absolute mean change from baseline in blood mercury concentrations during the post-treatment follow-up period is presented for the timepoints: Day 65, Day 95, and Day 125 (End of Study). | Screening and pre-dose Day -1 up to Day 125. | 
| Mean Change From Baseline in Blood Nickel Concentrations During the Treatment Period and Post-treatment Follow-up Period | Baseline blood nickel concentrations were defined as the average between the available screening and pre-dose (Day-1) values. Values below the LOD or below the LLOQ were replaced by LOD/2 or LLOQ/2 values. The absolute mean change from baseline in blood nickel concentrations during the treatment period is presented for the timepoints: 2 hours after the first dose, and prior to and after the second and third doses on Days 1 and 35, prior to the first dose on Days 2, 8, 15, 22 and 29, and on Day 36 in the morning. The absolute mean change from baseline in blood nickel concentrations during the post-treatment follow-up period is presented for the timepoints: Day 65, Day 95, and Day 125 (End of Study). | Screening and pre-dose Day -1 up to Day 125. | 
| Mean Change From Baseline in Urine Lead Levels During the Treatment Period and Post-treatment Follow-up Period | Baseline urine lead levels were defined as the average between the available screening and pre-dose (Day-1) values. Values below the LOD or below the LLOQ were replaced by LOD/2 or LLOQ/2 values. The absolute mean change from baseline in urine lead levels are presented for Day 35 of the treatment period (Visit 7, Week 5), and Day 65 (Visit 8, Week 9) and Day 95 (Visit 9, Week 13) in the post-treatment follow-up. | Screening and pre-dose Day -1 up to Day 95. | 
| Mean Change From Baseline in Urine Aluminium Levels During the Treatment Period and Post-treatment Follow-up Period | Baseline urine aluminium levels were defined as the average between the available screening and pre-dose (Day-1) values. Values below the LOD or below the LLOQ were replaced by LOD/2 or LLOQ/2 values. The absolute mean change from baseline in urine aluminium levels are presented for Day 35 of the treatment period (Visit 7, Week 5), and Day 65 (Visit 8, Week 9) and Day 95 (Visit 9, Week 13) in the post-treatment follow-up. | Screening and pre-dose Day -1 up to Day 95. | 
| Mean Change From Baseline in Urine Arsenic Levels During the Treatment Period and Post-treatment Follow-up Period | Baseline urine arsenic levels were defined as the average between the available screening and pre-dose (Day-1) values. Values below the LOD or below the LLOQ were replaced by LOD/2 or LLOQ/2 values. The absolute mean change from baseline in urine arsenic levels are presented for Day 35 of the treatment period (Visit 7, Week 5), and Day 65 (Visit 8, Week 9) and Day 95 (Visit 9, Week 13) in the post-treatment follow-up. | Screening and pre-dose Day -1 up to Day 95. | 
| Mean Change From Baseline in Urine Barium Levels During the Treatment Period and Post-treatment Follow-up Period | Baseline urine barium levels were defined as the average between the available screening and pre-dose (Day-1) values. Values below the LOD or below the LLOQ were replaced by LOD/2 or LLOQ/2 values. The absolute mean change from baseline in urine barium levels are presented for Day 35 of the treatment period (Visit 7, Week 5), and Day 65 (Visit 8, Week 9) and Day 95 (Visit 9, Week 13) in the post-treatment follow-up. | Screening and pre-dose Day -1 up to Day 95. | 
| Mean Change From Baseline in Urine Cadmium Levels During the Treatment Period and Post-treatment Follow-up Period | Baseline urine cadmium levels were defined as the average between the available screening and pre-dose (Day-1) values. Values below the LOD or below the LLOQ were replaced by LOD/2 or LLOQ/2 values. The absolute mean change from baseline in urine cadmium levels are presented for Day 35 of the treatment period (Visit 7, Week 5), and Day 65 (Visit 8, Week 9) and Day 95 (Visit 9, Week 13) in the post-treatment follow-up. | Screening and pre-dose Day -1 up to Day 95. | 
| Mean Change From Baseline in Urine Cobalt Levels During the Treatment Period and Post-treatment Follow-up Period | Baseline urine cobalt levels were defined as the average between the available screening and pre-dose (Day-1) values. Values below the LOD or below the LLOQ were replaced by LOD/2 or LLOQ/2 values. The absolute mean change from baseline in urine cobalt levels are presented for Day 35 of the treatment period (Visit 7, Week 5), and Day 65 (Visit 8, Week 9) and Day 95 (Visit 9, Week 13) in the post-treatment follow-up. | Screening and pre-dose Day -1 up to Day 95. | 
| Mean Change From Baseline in Urine Mercury Levels During the Treatment Period and Post-treatment Follow-up Period | Baseline urine mercury levels were defined as the average between the available screening and pre-dose (Day-1) values. Values below the LOD or below the LLOQ were replaced by LOD/2 or LLOQ/2 values. The absolute mean change from baseline in urine mercury levels are presented for Day 35 of the treatment period (Visit 7, Week 5), and Day 65 (Visit 8, Week 9) and Day 95 (Visit 9, Week 13) in the post-treatment follow-up. | Screening and pre-dose Day -1 up to Day 95. | 
| Mean Change From Baseline in Urine Nickel Levels During the Treatment Period and Post-treatment Follow-up Period | Baseline urine nickel levels were defined as the average between the available screening and pre-dose (Day-1) values. Values below the LOD or below the LLOQ were replaced by LOD/2 or LLOQ/2 values. The absolute mean change from baseline in urine nickel levels are presented for Day 35 of the treatment period (Visit 7, Week 5), and Day 65 (Visit 8, Week 9) and Day 95 (Visit 9, Week 13) in the post-treatment follow-up. | Screening and pre-dose Day -1 up to Day 95. |