Phase 2
N=23
Study of Gefapixant (MK-7264) in Adult Japanese Participants With Unexplained or Refractory Chronic Cough (MK-7264-033)
Chronic Cough
Bottom Line
View on ClinicalTrials.gov: NCT03482713 ↗Enrolled (actual)
23
Serious AEs
0.0%
Results posted
Jul 2019
Primary outcome: Primary: Number of Participants Who Experienced an Adverse Event — 9; 2 Participants
Study Design & Population
- Study type
- Interventional
- Phase
- Phase 2
- Interventions
- Gefapixant 45 mg (Drug); Placebo (Drug)
- Age
- Adult, Older Adult · 20+ yrs
- Sex
- All
- Sponsor
- Merck Sharp & Dohme LLC
- Primary completion
- Jun 2018
Outcome Measures
| Outcome | Result | p-value |
|---|---|---|
| PRIMARY Number of Participants Who Experienced an Adverse Event |
9; 2 | — |
| PRIMARY Number of Participants Who Discontinued Study Treatment Due to an Adverse Event |
1; 0 | — |
| SECONDARY Change From Baseline at Week 4 in Log-transformed 24-hour Coughs Per Hour |
-0.23; -1.02 | — |
| SECONDARY Change From Baseline at Week 4 in Log-transformed Awake Coughs Per Hour |
-0.20; -0.97 | — |
Summary
This estimation study (no hypotheses) will evaluate the safety, tolerability, and efficacy of gefapixant (MK-7264) in Japanese adult participants with unexplained or refractory chronic cough.
Eligibility Criteria
Inclusion Criteria
- Chest radiograph or computed tomography scan of the thorax (within 5 years of Screening/Visit 1 and after the onset of chronic cough) not demonstrating any abnormality considered to be significantly contributing to the chronic cough or any other clinically significant lung disease in the opinion of the principal investigator or the sub-investigator.
- Has had chronic cough for ≥ 1 year and a diagnosis of refractory chronic cough or unexplained chronic cough.
- For female participants, is a female who is not pregnant, not breastfeeding, not of childbearing potential, or agrees to follow contraceptive guidance
- Provides written informed consent and is willing and able to comply with the study protocol (including use of the digital cough recording device and completion of study questionnaires)
Exclusion Criteria
- Is a current smoker or has given up smoking within 12 months of Screening, or is a former smoker with a pack-year history >20 pack-years
- Has a history of upper or lower respiratory tract infection or recent clinically significant change in pulmonary status
- Has a history of chronic bronchitis
- Is currently taking an angiotensin converting enzyme inhibitor (ACEI), or has used an ACEI within 3 months of Screening
- Has a history of malignancy ≤5 years
- Has a screening systolic blood pressure >160 millimeters of mercury (mmHg) or a diastolic blood pressure >90 mm Hg
- Has a history of cutaneous adverse drug reaction to sulfonamides with or without systemic symptoms or history of anaphylaxis to sulfonamides
- Is a user of recreational or illicit drugs or has had a recent history of drug or alcohol abuse or dependence
- Has a known allergy/sensitivity or contraindication to gefapixant
- Has donated or lost ≥1 unit of blood within 8 weeks prior to the first dose of gefapixant
- Has previously received gefapixant or is currently participating in or has participated in an interventional clinical study
Data sourced from ClinicalTrials.gov (NCT03482713). Outcome figures and adverse-event rates are extracted automatically from the registry's posted results and are provided for clinician reference, not as a substitute for the primary publication.