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CompletedNCT03447821Updated Feb 18, 2020Results posted

Efficacy and Safety of CB-01-11 200mg Tablets in Infectious Diarrhoea

A Phase 2 interventional study of 400 mg Rifamycin SV dosage and 800 mg Rifamycin SV dosage in Infectious Diarrhoea, sponsored by Cosmo Technologies Ltd. Completed. Open to participants aged 18 Years to 65 Years. Per ClinicalTrials.gov, last updated 2020-02-18.

Sponsored by Cosmo Technologies Ltd · Phase 2, Interventional, and Treatment

From the registry’s dates

  • Registered 10 years after the study started (first participant enrolled Feb 2008, registered Feb 2018).
Phase
Phase 2
Study type
Interventional
Enrollment
40
Allocation
Randomized
Ages
18 Years to 65 Years
Sex
All
01

Study summary

To assess the safety and the preliminary efficacy data on the three doses of the new Cosmo Technologies oral rifamycin SV colon-release 200 mg tablets manufactured according to MMX technology (CB-01-11) in the treatment of infectious diarrhoea.

Read the detailed description

To assess the safety and the preliminary efficacy data on the three doses of the new Cosmo Technologies oral rifamycin SV colon-release 200 mg tablets manufactured according to MMXTM technology (CB-01-11) in the treatment of infectious diarrhoea.

Primary end points to determine:

  • The safety and preliminary efficacy data of the three doses of the new rifamycin SV formulation tested based upon the time elapsed from the ingestion of the 1st dose of study medication to the passage of the last unformed stool (TLUS), in compliance with the relevant guidelines

Secondary end-points to determine:

  • The number of patients showing improvement in diarrhoea during a 24-h interval, i.e. >50 % reduction of bowel movements.
  • The number of unformed stools passed per 24-h interval, after dosing.
  • The number of patients who are declared to be "well". Wellness is defined as the patient having 48 hours with no unformed stools, a maximum of two soft stools and no clinical symptoms of infectious diarrhoea.
  • The number of treatment failures. A treatment failure is defined as clinical deterioration or worsening of symptoms or illness continuing after 120 h following the first dose.
  • The number and percentage of patients recovered from diarrhoea. Patients were considered to have recovered if fewer than three unformed stools were passed in the previous 24 hours and no symptom of enteric infection were present.
02

Conditions studied

  • Infectious Diarrhoea

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Keywords

  • Infectious diarrhoea
  • rifamycin SV
  • rifamycin SV MMX
  • MMX
03

In context

Dysentery

44 studies on the registry are indexed under Dysentery; 6 are open to participants now.

This study's enrollment of 40 is below the median of 163 across 38 interventional studies indexed under Dysentery.

Browse Dysentery studies →

Lead sponsor

Cosmo Technologies Ltd is the lead sponsor of 12 studies on the registry; 1 is open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 65 Years
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

Patients had to meet all of the following inclusion criteria:

  • Male and female patients aged 18-65 years inclusive on the date of screening.
  • Patients with infectious diarrhoea (ID) in the active phase of no more than 72-h duration. Criteria for diagnosis of ID were: three or more unformed stools in the preceding 24 hours, and at least one symptom of enteric infection e.g. abdominal cramps/pain, tenesmus, urgency, an excess of gas/flatulence, nausea, vomiting.
  • If female, and of , use of an effective method. (Oral contraceptives, injectable hormonal contraceptives, double-barrier method (condom/diaphragm with spermicide) and intra-uterine devices, according to the definition of Note 3 of ICH M3(M) Guideline. Females were considered not to be of child-bearing potential, if they were at least 12 months .
  • Ability, in the investigator's opinion to comprehend the full nature and purpose of the study, including the possible risks and side effects, and willing to comply with the requirements of the study.
  • Patients who have voluntarily signed and dated the document for screening and study specific procedures.
  • Patients must be sufficiently literate to be able to complete a diary card.

Exclusion criteria

Exclusion Criteria:

Patients had not to have had of any of the following:

  • Females of not using an effective method.
  • Pregnant or lactating females.
  • Fever (defined as a body (axillary) temperature ≥ 38° C) present either at the screening visit or in the previous 24 hours.
  • Visible presence of blood in the stool at baseline.
  • Patients with any history or evidence on examination, of gastrointestinal (in particular intestinal obstruction and severe intestinal ulcerative lesions), renal, hepatic, endocrine, respiratory, cardiovascular, dermatological or haematological disease, which in the opinion of the investigator could affect the interpretation of the efficacy and safety data.
  • Patients with moderate or severe dehydration (see Appendix 2 of the protocol, for definitions of clinical symptoms).
  • Prohibited previous and concomitant medication (see relevant section of the protocol).
  • History of recent gastrointestinal (within 6 months).
  • Allergy: presumptive or ascertained to the study drug, history of anaphylaxis or allergic reactions in general.
  • History of, or current misuse of alcohol, drugs or abuse of medication.
  • Participation in another study with any product within 3 months before screening.
  • Patients who, in the opinion of the investigator, could be un-cooperative and/or non-compliant and should not therefore participate in the study.
Terms in these criteria, in plain language(8)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Childbearing potential

Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).

Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.

Contraception

Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.

Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.

Postmenopausal

Periods have stopped for good: usually no period for 12 months in a row without another medical reason, sometimes confirmed by a blood test (FSH).

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

Clinically significant

Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.

Cancer (malignancy)

Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.

Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.

Hypersensitivity

An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.

Investigational drug or device

A drug or device being studied in a clinical trial.

It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.

05

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double (Participant, Investigator)
Enrollment
40 participants (actual)

Study arms

  • Active comparator
    400 mg Rifamycin SV dosage

    Two enteric coated, modified release tablets, each containing 200 mg Rifamycin SV, taken three times daily. Four of the six daily tablet taken in this group were placebos.

    Drug: 400 mg Rifamycin SV dosage

  • Active comparator
    800 mg Rifamycin SV dosage

    Two enteric coated, modified release tablets, each containing 200 mg Rifamycin SV, taken three times daily. Two of the six daily tablet taken in this group were placebos.

    Drug: 800 mg Rifamycin SV dosage

  • Active comparator
    1200 mg Rifamycin SV dosage

    Two enteric coated, modified release tablets, each containing 200 mg Rifamycin SV, taken three times daily. None of the six daily tablet taken in this group were placebos.

    Drug: 1200 mg Rifamycin SV dosage

Interventions

  • Drug400 mg Rifamycin SV dosage
  • Drug800 mg Rifamycin SV dosage
  • Drug1200 mg Rifamycin SV dosage
06

What researchers measure

Primary outcomes

  1. Time to Last Unformed Stool (TLUS)

    The safety and preliminary efficacy data of the three doses of the new rifamycin SV formulation tested based upon the time elapsed from the ingestion of the 1st dose of study medication to the passage of the last unformed stool (TLUS)

    Time frame: Up to 7 days

Secondary outcomes

  1. The Number of Patients Showing Improvement in Diarrhoea During a 48h Interval

    The evaluation of improvement in diarrhoea during a 48 hour interval is defined as a \>50% reduction of bowel movements versus the baseline value

    Time frame: 48 hours

  2. The Number of Unformed Stools Passed Per 24-h Interval

    The number of unformed stools passed per 24-h interval, after dosing

    Time frame: 192 hours

  3. The Number of Patients Who Are Declared to be "Well"

    The patient having must meet all of the following criteria in order to be classified as "well": 48 hours with no unformed stools with a maximum of two soft stools and no clinical symptoms of infectious diarrhoea.

    Time frame: 48 hours

  4. Number of Participants With Treatment Failure

    A treatment failure is defined as clinical deterioration or worsening of symptoms or illness continuing after 120 h following the first dose.

    Time frame: 120 hours

  5. The Number of Patients Recovered From Diarrhoea

    Patients were considered to have recovered if fewer than three unformed stools were passed in the previous 24 hours and no symptom of enteric infection were present.

    Time frame: 24 hours

07

Results

Posted Oct 9, 2018

Participant flow

Participant flow — Overall Study
Milestone400 mg Rifamycin SV Dosage800 mg Rifamycin SV Dosage1200 mg Rifamycin SV Dosage
Started141313
Completed131212
Not completed111
Withdrew: Withdrawal by subject110
Withdrew: Lost to follow-up001

Outcome measures

PrimaryTime to Last Unformed Stool (TLUS)

The safety and preliminary efficacy data of the three doses of the new rifamycin SV formulation tested based upon the time elapsed from the ingestion of the 1st dose of study medication to the passage of the last unformed stool (TLUS)

Time frame:
Up to 7 days
Reported as:
Mean · hours
Time to Last Unformed Stool (TLUS)
hours400 mg Rifamycin SV Dosage800 mg Rifamycin SV Dosage1200 mg Rifamycin SV Dosage
Time to Last Unformed Stool (TLUS)59.3 ± 12.151.4 ± 12.357.4 ± 13.1
SecondaryThe Number of Patients Showing Improvement in Diarrhoea During a 48h Interval

The evaluation of improvement in diarrhoea during a 48 hour interval is defined as a \>50% reduction of bowel movements versus the baseline value

Time frame:
48 hours
Reported as:
Count of participants · Participants
The Number of Patients Showing Improvement in Diarrhoea During a 48h Interval
Participants400 mg Rifamycin SV Dosage800 mg Rifamycin SV Dosage1200 mg Rifamycin SV Dosage
Showed improvement within 48 hrs496
Showed no improvement within 48 hrs936
SecondaryThe Number of Unformed Stools Passed Per 24-h Interval

The number of unformed stools passed per 24-h interval, after dosing

Time frame:
192 hours
Reported as:
Mean · Unformed stools
The Number of Unformed Stools Passed Per 24-h Interval
Unformed stools400 mg Rifamycin SV Dosage800 mg Rifamycin SV Dosage1200 mg Rifamycin SV Dosage
0-24 h5.23 ± 2.744.67 ± 3.174.73 ± 3.41
24-48 h2.15 ± 1.951.5 ± 1.572.64 ± 2.66
48-72 h2.09 ± 1.641.29 ± 1.61.7 ± 1.95
72-96 h1.5 ± 1.291.67 ± 2.081.8 ± 2.05
96-120 h1.5 ± 0.711.5 ± 2.120.75 ± 0.96
120-144 h3 ± 00.5 ± 0.711 ± 0
144-168 h3 ± 01 ± 01 ± 0
168-192 h0 ± 01 ± 01 ± 0
SecondaryThe Number of Patients Who Are Declared to be "Well"

The patient having must meet all of the following criteria in order to be classified as "well": 48 hours with no unformed stools with a maximum of two soft stools and no clinical symptoms of infectious diarrhoea.

Time frame:
48 hours
Reported as:
Count of participants · Participants
The Number of Patients Who Are Declared to be "Well"
Participants400 mg Rifamycin SV Dosage800 mg Rifamycin SV Dosage1200 mg Rifamycin SV Dosage
Wellness Yes13102
Wellness No029
SecondaryNumber of Participants With Treatment Failure

A treatment failure is defined as clinical deterioration or worsening of symptoms or illness continuing after 120 h following the first dose.

Time frame:
120 hours
Reported as:
Count of participants · Participants
Number of Participants With Treatment Failure
Participants400 mg Rifamycin SV Dosage800 mg Rifamycin SV Dosage1200 mg Rifamycin SV Dosage
No12109
Yes122
SecondaryThe Number of Patients Recovered From Diarrhoea

Patients were considered to have recovered if fewer than three unformed stools were passed in the previous 24 hours and no symptom of enteric infection were present.

Time frame:
24 hours
Reported as:
Count of participants · Participants
The Number of Patients Recovered From Diarrhoea
Participants400 mg Rifamycin SV Dosage800 mg Rifamycin SV Dosage1200 mg Rifamycin SV Dosage
No122
Yes12109

Adverse events

Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
400 mg Rifamycin SV Dosage0/13 (0%)0/13 (0%)4/13 (30.8%)
800 mg Rifamycin SV Dosage0/12 (0%)0/12 (0%)3/12 (25%)
1200 mg Rifamycin SV Dosage0/12 (0%)0/12 (0%)4/12 (33.3%)
Most frequent other events
Most frequent other events
Event400 mg Rifamycin SV Dosage800 mg Rifamycin SV Dosage1200 mg Rifamycin SV Dosage
GASTROINTESTINAL DISORDERSGastrointestinal disorders2/133/121/12
NERVOUS SYSTEMNervous system disorders0/130/123/12
GENERAL DISORDERSGeneral disorders2/130/120/12
CARDIAC DISORDERSCardiac disorders0/130/121/12
MUSCULOSKELETALMusculoskeletal and connective tissue disorders0/130/121/12
PSYCHIATRIC DISORDERSPsychiatric disorders1/130/120/12
SKIN AND SUBCUTANEOUSSkin and subcutaneous tissue disorders1/130/120/12

Baseline characteristics

Intent To Treat

Age, Continuous
Age, Continuous(years)400 mg Rifamycin SV Dosage800 mg Rifamycin SV Dosage1200 mg Rifamycin SV DosageTotal
Mean39.5 ± 12.137.3 ± 15.941.9 ± 12.739.6 ± 13.4
Sex: Female, Male
Sex: Female, Male(Participants)400 mg Rifamycin SV Dosage800 mg Rifamycin SV Dosage1200 mg Rifamycin SV DosageTotal
Female68721
Male74516
Height (cm)
Height (cm)(cm)400 mg Rifamycin SV Dosage800 mg Rifamycin SV Dosage1200 mg Rifamycin SV DosageTotal
Mean165.2 ± 9.8160.8 ± 9.7159.1 ± 6.2161.8 ± 8.9
Weight (kg)
Weight (kg)(kg)400 mg Rifamycin SV Dosage800 mg Rifamycin SV Dosage1200 mg Rifamycin SV DosageTotal
Mean72.3 ± 16.772.9 ± 1770.3 ± 11.871.8 ± 15
Axillary Temperature (°C)
Axillary Temperature (°C)(Degrees Celsius)400 mg Rifamycin SV Dosage800 mg Rifamycin SV Dosage1200 mg Rifamycin SV DosageTotal
Mean36.8 ± 0.536.8 ± 0.436.7 ± 0.436.8 ± 0.4
08

Study locations

No study locations are listed for this record.

09

References and documents

Individual participant data

Plan to share: No — None. IPD not to be shared.

No publications or documents are linked to this record.

10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Feb 18, 2020, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT03447821
Lead sponsor
Cosmo Technologies Ltd
Responsible party
Sponsor
First posted
Feb 27, 2018
Start date
Feb 2008
Primary completion
Jul 2008
Completion
Jul 2008
Results posted
Oct 9, 2018
Last update
Feb 18, 2020

Study contacts

Manuel Mancera Reyes
principal investigator · HOSPITAL CENTRAL DE ORIENTE
Can Polat Eyigün
principal investigator · Gülhane Military Medical Academy

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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