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    Clinical Trial Results:
    A double-blind, randomised, placebo-controlled, crossover study to assess the efficacy of XEN D0501, a TRPV1 antagonist, in reducing the frequency of cough in patients with chronic idiopathic cough

    Summary
    EudraCT number
    2014-000306-36
    Trial protocol
    GB  
    Global end of trial date
    15 Jun 2015

    Results information
    Results version number
    v1(current)
    This version publication date
    09 Jul 2016
    First version publication date
    09 Jul 2016
    Other versions

    Trial information

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    Trial identification
    Sponsor protocol code
    XEN-D0501-CL-04
    Additional study identifiers
    ISRCTN number
    -
    US NCT number
    NCT02233699
    WHO universal trial number (UTN)
    -
    Sponsors
    Sponsor organisation name
    Xention Ltd
    Sponsor organisation address
    Unit 5, Quern House, Hinton Way, Great Shelford, United Kingdom, CB22 5LD
    Public contact
    Chief Medical Officer, Xention Limited, + 44 1223493900, info@xention.com
    Scientific contact
    Chief Medical Officer, Xention Limited, + 44 1223493900, info@xention.com
    Paediatric regulatory details
    Is trial part of an agreed paediatric investigation plan (PIP)
    No
    Does article 45 of REGULATION (EC) No 1901/2006 apply to this trial?
    No
    Does article 46 of REGULATION (EC) No 1901/2006 apply to this trial?
    No
    Results analysis stage
    Analysis stage
    Final
    Date of interim/final analysis
    15 Jun 2015
    Is this the analysis of the primary completion data?
    Yes
    Primary completion date
    15 Jun 2015
    Global end of trial reached?
    Yes
    Global end of trial date
    15 Jun 2015
    Was the trial ended prematurely?
    No
    General information about the trial
    Main objective of the trial
    To evaluate the effectiveness of XEN-D0501 over placebo in reducing objective daytime cough frequency.
    Protection of trial subjects
    No specific measures required.
    Background therapy
    -
    Evidence for comparator
    -
    Actual start date of recruitment
    02 Jun 2014
    Long term follow-up planned
    No
    Independent data monitoring committee (IDMC) involvement?
    No
    Population of trial subjects
    Number of subjects enrolled per country
    Country: Number of subjects enrolled
    United Kingdom: 20
    Worldwide total number of subjects
    20
    EEA total number of subjects
    20
    Number of subjects enrolled per age group
    In utero
    0
    Preterm newborn - gestational age < 37 wk
    0
    Newborns (0-27 days)
    0
    Infants and toddlers (28 days-23 months)
    0
    Children (2-11 years)
    0
    Adolescents (12-17 years)
    0
    Adults (18-64 years)
    11
    From 65 to 84 years
    9
    85 years and over
    0

    Subject disposition

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    Recruitment
    Recruitment details
    -

    Pre-assignment
    Screening details
    Screening within 23 days prior to the first dose of study drug.

    Period 1
    Period 1 title
    Overall Study (overall period)
    Is this the baseline period?
    Yes
    Allocation method
    Randomised - controlled
    Blinding used
    Double blind
    Roles blinded
    Subject, Investigator, Monitor, Data analyst, Assessor

    Arms
    Are arms mutually exclusive
    No

    Arm title
    XEN-D0501
    Arm description
    -
    Arm type
    Experimental

    Investigational medicinal product name
    XEN-D0501
    Investigational medicinal product code
    XEN-D0501
    Other name
    Pharmaceutical forms
    Tablet
    Routes of administration
    Oral use
    Dosage and administration details
    4 mg tablet formulation twice daily

    Arm title
    Placebo
    Arm description
    -
    Arm type
    Experimental

    Investigational medicinal product name
    Placebo
    Investigational medicinal product code
    Placebo
    Other name
    Pharmaceutical forms
    Tablet
    Routes of administration
    Oral use
    Dosage and administration details
    4mg tablet formulation twice daily

    Number of subjects in period 1
    XEN-D0501 Placebo
    Started
    19
    19
    Completed
    19
    19

    Baseline characteristics

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    Baseline characteristics reporting groups
    Reporting group title
    XEN-D0501
    Reporting group description
    -

    Reporting group title
    Placebo
    Reporting group description
    -

    Reporting group values
    XEN-D0501 Placebo Total
    Number of subjects
    19 19 20
    Age categorical
    Units: Subjects
        In utero
    0 0 0
        Preterm newborn infants (gestational age < 37 wks)
    0 0 0
        Newborns (0-27 days)
    0 0 0
        Infants and toddlers (28 days-23 months)
    0 0 0
        Children (2-11 years)
    0 0 0
        Adolescents (12-17 years)
    0 0 0
        Adults (18-64 years)
    10 11 11
        From 65-84 years
    9 8 9
        85 years and over
    0 0 0
    Gender categorical
    Units: Subjects
        Female
    14 15 15
        Male
    5 4 5
    Subject analysis sets

    Subject analysis set title
    FAS
    Subject analysis set type
    Modified intention-to-treat
    Subject analysis set description
    The FAS consisted of all patients who were randomized into the study and received at least 1 dose of study drug and for whom baseline and end-of-treatment objective daytime cough frequency data were available for at least 1 treatment.

    Subject analysis sets values
    FAS
    Number of subjects
    19
    Age categorical
    Units: Subjects
        In utero
    0
        Preterm newborn infants (gestational age < 37 wks)
    0
        Newborns (0-27 days)
    0
        Infants and toddlers (28 days-23 months)
    0
        Children (2-11 years)
    0
        Adolescents (12-17 years)
    0
        Adults (18-64 years)
    11
        From 65-84 years
    8
        85 years and over
    0
    Age continuous
    Units:
        
    ±
    Gender categorical
    Units: Subjects
        Female
    15
        Male
    4

    End points

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    End points reporting groups
    Reporting group title
    XEN-D0501
    Reporting group description
    -

    Reporting group title
    Placebo
    Reporting group description
    -

    Subject analysis set title
    FAS
    Subject analysis set type
    Modified intention-to-treat
    Subject analysis set description
    The FAS consisted of all patients who were randomized into the study and received at least 1 dose of study drug and for whom baseline and end-of-treatment objective daytime cough frequency data were available for at least 1 treatment.

    Primary: Change from baseline at the end of each Treatment Period in objective daytime cough frequency.

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    End point title
    Change from baseline at the end of each Treatment Period in objective daytime cough frequency.
    End point description
    End point type
    Primary
    End point timeframe
    After 14 days treatment.
    End point values
    XEN-D0501 Placebo
    Number of subjects analysed
    18
    19
    Units: Coughs/hour
        arithmetic mean (standard deviation)
    6.72 ± 16.89
    0.37 ± 13.74
    Statistical analysis title
    Mixed effects linear model
    Statistical analysis description
    A mixed effects linear model was used with baseline and treatment period as fixed effects and patient as a random effect. The objective daytime cough frequency was log-transformed prior to analysis. The difference in the objective daytime cough frequency between active to placebo and 95% confidence interval were estimated. A significance value testing a hypothesis of a ratio of one (no difference between treatments) is presented.
    Comparison groups
    XEN-D0501 v Placebo
    Number of subjects included in analysis
    37
    Analysis specification
    Pre-specified
    Analysis type
    superiority
    P-value
    = 0.4151
    Method
    Mixed models analysis
    Confidence interval

    Adverse events

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    Adverse events information
    Timeframe for reporting adverse events
    From subject signing off the informed consent form to subject's last visit
    Assessment type
    Systematic
    Dictionary used for adverse event reporting
    Dictionary name
    MedDRA
    Dictionary version
    17.0
    Reporting groups
    Reporting group title
    XEN-D0501
    Reporting group description
    -

    Reporting group title
    Placebo
    Reporting group description
    -

    Serious adverse events
    XEN-D0501 Placebo
    Total subjects affected by serious adverse events
         subjects affected / exposed
    0 / 19 (0.00%)
    0 / 19 (0.00%)
         number of deaths (all causes)
    0
    0
         number of deaths resulting from adverse events
    0
    0
    Frequency threshold for reporting non-serious adverse events: 0.05%
    Non-serious adverse events
    XEN-D0501 Placebo
    Total subjects affected by non serious adverse events
         subjects affected / exposed
    18 / 19 (94.74%)
    9 / 19 (47.37%)
    Vascular disorders
    Flushing
         subjects affected / exposed
    1 / 19 (5.26%)
    0 / 19 (0.00%)
         occurrences all number
    1
    0
    Hot flush
         subjects affected / exposed
    1 / 19 (5.26%)
    0 / 19 (0.00%)
         occurrences all number
    1
    0
    Peripheral coldness
         subjects affected / exposed
    1 / 19 (5.26%)
    0 / 19 (0.00%)
         occurrences all number
    1
    0
    General disorders and administration site conditions
    Feeling of body temperature change
         subjects affected / exposed
    6 / 19 (31.58%)
    0 / 19 (0.00%)
         occurrences all number
    6
    0
    Feeling hot
         subjects affected / exposed
    3 / 19 (15.79%)
    0 / 19 (0.00%)
         occurrences all number
    3
    0
    Chest discomfort
         subjects affected / exposed
    2 / 19 (10.53%)
    0 / 19 (0.00%)
         occurrences all number
    1
    0
    Fatigue
         subjects affected / exposed
    1 / 19 (5.26%)
    0 / 19 (0.00%)
         occurrences all number
    1
    0
    Feeling cold
         subjects affected / exposed
    1 / 19 (5.26%)
    0 / 19 (0.00%)
         occurrences all number
    1
    0
    Temperature intolerance
         subjects affected / exposed
    1 / 19 (5.26%)
    0 / 19 (0.00%)
         occurrences all number
    1
    0
    Respiratory, thoracic and mediastinal disorders
    Cough
         subjects affected / exposed
    2 / 19 (10.53%)
    2 / 19 (10.53%)
         occurrences all number
    2
    3
    Epistaxis
         subjects affected / exposed
    2 / 19 (10.53%)
    0 / 19 (0.00%)
         occurrences all number
    2
    0
    Oropharyngeal pain
         subjects affected / exposed
    0 / 19 (0.00%)
    2 / 19 (10.53%)
         occurrences all number
    0
    2
    Sputum retention
         subjects affected / exposed
    1 / 19 (5.26%)
    0 / 19 (0.00%)
         occurrences all number
    1
    0
    Throat tightness
         subjects affected / exposed
    1 / 19 (5.26%)
    0 / 19 (0.00%)
         occurrences all number
    1
    0
    Psychiatric disorders
    Sleep disorder
         subjects affected / exposed
    1 / 19 (5.26%)
    0 / 19 (0.00%)
         occurrences all number
    1
    0
    Investigations
    Activated partial thromboplastin time prolonged
         subjects affected / exposed
    1 / 19 (5.26%)
    0 / 19 (0.00%)
         occurrences all number
    1
    0
    Body temperature fluctuation
         subjects affected / exposed
    1 / 19 (5.26%)
    0 / 19 (0.00%)
         occurrences all number
    1
    0
    Cold agglutinins positive
         subjects affected / exposed
    1 / 19 (5.26%)
    0 / 19 (0.00%)
         occurrences all number
    1
    0
    International normalised ratio increased
         subjects affected / exposed
    1 / 19 (5.26%)
    0 / 19 (0.00%)
         occurrences all number
    1
    0
    Liver function test abnormal
         subjects affected / exposed
    0 / 19 (0.00%)
    1 / 19 (5.26%)
         occurrences all number
    0
    1
    Platelet count increased
         subjects affected / exposed
    1 / 19 (5.26%)
    0 / 19 (0.00%)
         occurrences all number
    1
    0
    Prothrombin time prolonged
         subjects affected / exposed
    1 / 19 (5.26%)
    0 / 19 (0.00%)
         occurrences all number
    1
    0
    Injury, poisoning and procedural complications
    Muscle strain
         subjects affected / exposed
    1 / 19 (5.26%)
    0 / 19 (0.00%)
         occurrences all number
    1
    0
    Thermal burn
         subjects affected / exposed
    1 / 19 (5.26%)
    0 / 19 (0.00%)
         occurrences all number
    2
    0
    Cardiac disorders
    Palpitations
         subjects affected / exposed
    1 / 19 (5.26%)
    0 / 19 (0.00%)
         occurrences all number
    1
    0
    Nervous system disorders
    Dysgeusia
         subjects affected / exposed
    9 / 19 (47.37%)
    1 / 19 (5.26%)
         occurrences all number
    9
    2
    Thermohypoaesthesia
         subjects affected / exposed
    8 / 19 (42.11%)
    0 / 19 (0.00%)
         occurrences all number
    12
    0
    Headache
         subjects affected / exposed
    3 / 19 (15.79%)
    1 / 19 (5.26%)
         occurrences all number
    4
    2
    Burning sensation
         subjects affected / exposed
    2 / 19 (10.53%)
    0 / 19 (0.00%)
         occurrences all number
    2
    0
    Dizziness
         subjects affected / exposed
    2 / 19 (10.53%)
    0 / 19 (0.00%)
         occurrences all number
    2
    0
    Hypoaesthesia
         subjects affected / exposed
    2 / 19 (10.53%)
    0 / 19 (0.00%)
         occurrences all number
    2
    0
    Paraesthesia
         subjects affected / exposed
    2 / 19 (10.53%)
    0 / 19 (0.00%)
         occurrences all number
    3
    0
    Sensory disturbance
         subjects affected / exposed
    1 / 19 (5.26%)
    0 / 19 (0.00%)
         occurrences all number
    1
    0
    Ear and labyrinth disorders
    Ear discomfort
         subjects affected / exposed
    2 / 19 (10.53%)
    0 / 19 (0.00%)
         occurrences all number
    2
    0
    Ear pain
         subjects affected / exposed
    1 / 19 (5.26%)
    0 / 19 (0.00%)
         occurrences all number
    1
    0
    Vertigo
         subjects affected / exposed
    1 / 19 (5.26%)
    0 / 19 (0.00%)
         occurrences all number
    2
    0
    Eye disorders
    Visual impairment
         subjects affected / exposed
    1 / 19 (5.26%)
    0 / 19 (0.00%)
         occurrences all number
    1
    0
    Gastrointestinal disorders
    Diarrhoea
         subjects affected / exposed
    1 / 19 (5.26%)
    2 / 19 (10.53%)
         occurrences all number
    1
    2
    Paraesthesia oral
         subjects affected / exposed
    3 / 19 (15.79%)
    0 / 19 (0.00%)
         occurrences all number
    4
    0
    Lip dry
         subjects affected / exposed
    2 / 19 (10.53%)
    0 / 19 (0.00%)
         occurrences all number
    2
    0
    Oral discomfort
         subjects affected / exposed
    2 / 19 (10.53%)
    0 / 19 (0.00%)
         occurrences all number
    2
    0
    Oral mucosal exfoliation
         subjects affected / exposed
    2 / 19 (10.53%)
    0 / 19 (0.00%)
         occurrences all number
    2
    0
    Oral pain
         subjects affected / exposed
    2 / 19 (10.53%)
    0 / 19 (0.00%)
         occurrences all number
    2
    0
    Chapped lips
         subjects affected / exposed
    1 / 19 (5.26%)
    0 / 19 (0.00%)
         occurrences all number
    1
    0
    Dyspepsia
         subjects affected / exposed
    1 / 19 (5.26%)
    0 / 19 (0.00%)
         occurrences all number
    1
    0
    Hypoaesthesia oral
         subjects affected / exposed
    1 / 19 (5.26%)
    0 / 19 (0.00%)
         occurrences all number
    1
    0
    Lip blister
         subjects affected / exposed
    1 / 19 (5.26%)
    0 / 19 (0.00%)
         occurrences all number
    1
    0
    Lip swelling
         subjects affected / exposed
    1 / 19 (5.26%)
    0 / 19 (0.00%)
         occurrences all number
    1
    0
    Mouth ulceration
         subjects affected / exposed
    1 / 19 (5.26%)
    0 / 19 (0.00%)
         occurrences all number
    1
    0
    Nausea
         subjects affected / exposed
    0 / 19 (0.00%)
    1 / 19 (5.26%)
         occurrences all number
    0
    1
    Skin and subcutaneous tissue disorders
    Hyperhidrosis
         subjects affected / exposed
    3 / 19 (15.79%)
    0 / 19 (0.00%)
         occurrences all number
    3
    0
    Blister
         subjects affected / exposed
    3 / 19 (15.79%)
    0 / 19 (0.00%)
         occurrences all number
    2
    0
    Night sweats
         subjects affected / exposed
    1 / 19 (5.26%)
    0 / 19 (0.00%)
         occurrences all number
    1
    0
    Musculoskeletal and connective tissue disorders
    Musculoskeletal pain
         subjects affected / exposed
    0 / 19 (0.00%)
    1 / 19 (5.26%)
         occurrences all number
    0
    1
    Infections and infestations
    Nasopharyngitis
         subjects affected / exposed
    1 / 19 (5.26%)
    1 / 19 (5.26%)
         occurrences all number
    1
    1
    Lower respiratory tract infection
         subjects affected / exposed
    0 / 19 (0.00%)
    1 / 19 (5.26%)
         occurrences all number
    0
    1
    Metabolism and nutrition disorders
    Decreased appetite
         subjects affected / exposed
    1 / 19 (5.26%)
    0 / 19 (0.00%)
         occurrences all number
    1
    0

    More information

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    Substantial protocol amendments (globally)

    Were there any global substantial amendments to the protocol? Yes
    Date
    Amendment
    14 May 2014
    • Correction of exclusion criterion 19 • Correction of the visit numbers in inclusion criteria 4 and 5 • Revision of the study endpoints to clarify that the primary endpoint was the change from baseline at the end of each treatment period in objective daytime cough frequency of XEN-D0501 compared to placebo. Secondary endpoints were revised to clarify that the change from baseline at the end of each treatment period was assessed for the capsaicin cough response (Emax), objective 24-hour cough frequency and Leicester cough questionnaire. The difference between XEN-D0501 and placebo at the end of each treatment period was assessed for the hourly change in cough frequency and for the global rating of change scale and that the change from baseline over each treatment period was assessed for cough severity and urge to cough (VAS) • Revision of the statistical methodology used for the analysis of the secondary endpoints due to the revision of secondary endpoints.
    04 Mar 2015
    • Clarification of the definition of “normal” chest radiography throughout the protocol.
    12 May 2015
    • Revision of text to reduce the number of planned patients from 25 to 20 and the number of completed patients from 20 to at least 16.

    Interruptions (globally)

    Were there any global interruptions to the trial? No

    Limitations and caveats

    Limitations of the trial such as small numbers of subjects analysed or technical problems leading to unreliable data.
    None reported
    For support, Contact us.
    The status and protocol content of GB trials is no longer updated since 1 January 2021. For the UK, as of 31 January 2021, EU Law applies only to the territory of Northern Ireland (NI) to the extent foreseen in the Protocol on Ireland/NI. Legal notice
    As of 31 January 2023, all EU/EEA initial clinical trial applications must be submitted through CTIS . Updated EudraCT trials information and information on PIP/Art 46 trials conducted exclusively in third countries continues to be submitted through EudraCT and published on this website.

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