chronic cough MedDRA version: 21.1 Level: LLT Classification code 10066656 Term: Chronic cough System Organ Class: 100000004855
Conditions
Sponsors
Merck Sharp & Dohme Corp., a subsidiary of Merck & Co., Inc.
Eligibility
Sex/Gender
All
Inclusion criteria
Inclusion criteria: 1. 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. 2. Have chronic cough for =1 year and a diagnosis of refractory chronic cough or unexplained chronic cough. 3. Have a score of =40 mm on the Cough Severity VAS at both the Screening and Baseline visits. 4. Participant is Male or Female at least 18 years of age at the time of informed consent. 5. A female participant is eligible to participate if she is not pregnant, not breastfeeding, and at least one of the following conditions applies: a. Not a woman of childbearing potential (WOCBP) OR b. A WOCBP who agrees to follow the contraceptive guidance from the time of signing the informed consent through at least 14 days after the last dose of study intervention. 6. The participant (or legally acceptable representative if applicable) provides written informed consent for the study. The participant may also provide consent for future biomedical research. However the participant may participate in the main study without participating in future biomedical research. 7. The participant is willing and able to comply with all aspects of the protocol, including demonstrating an ability to follow study procedures (including use of the digital cough recording device, and completion of the Cough Severity VAS, CSD, LCQ, and other protocol questionnaires) to the satisfaction of the investigator/qualified designee prior to randomization. Are the trial subjects under 18? no Number of subjects for this age range: F.1.2 Adults (18-64 years) yes F.1.2.1 Number of subjects for this age range 860 F.1.3 Elderly (>=65 years) yes F.1.3.1 Number of subjects for this age range 430
Exclusion criteria
Exclusion criteria: 1. Current smoker. 2. Individuals who have given up smoking within 12 months of Screening/Visit 1. 3. Former smokers with a pack/year history greater than 20 pack-years. 4. Forced expiratory volume in 1 second (FEV1)/ forced vital capacity (FVC) ratio 160 mm Hg or a diastolic blood pressure >90 mm Hg. 12. History of anaphylaxis or cutaneous adverse drug reaction (with or without systemic symptoms) to sulfonamide antibiotics or other sulfonamide-containing drugs. 13. Has a known allergy/sensitivity or contraindication to MK-7264 or its excipients. 14. Has donated or lost =1 unit of blood (approximately 300 mL) within 8 weeks prior to the first dose of MK-7264. 15. A WOCBP who has a positive urine pregnancy test at Visit 1. If the urine test is positive or cannot be confirmed as negative, a serum pregnancy test will be required. 16. Requiring treatment with a therapy that does not adhere to the guidance parameters specified in the Protocol. 17. Has previously received MK-7264. 18. Is currently participating in or has participated in an interventional clinical study with an investigational compound or device within 30 days of participating in this current study. 19. Significantly abnormal laboratory tests at Screening. 20. Has a history or current evidence of any condition, therapy, lab abnormality, or other circumstance that may increase the risk associated with study participation or study intervention administration or may interfere with the interpretation of study results, and in the judgment of the investigator or Sponsor, would make the participant inappropriate for entry into this study. 21. Is or has an immediate family member (eg, spouse, parent/legal guardian, sibling or child) who is investigational site or Sponsor staff directly involved with this study.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Main Objective: 1. To evaluate the efficacy of MK-7264 in reducing cough frequency as measured over a 24-hour period 2. To evaluate the safety and tolerability of MK-7264;Secondary Objective: 1. To evaluate the efficacy of MK-7264 in reducing cough frequency as measured while awake during a 24-hour period 2. To evaluate the ability of MK-7264 to provide a clinically significant improvement in cough specific quality of life 3. To evaluate the efficacy of MK-7264 based on the proportion of participants with a clinically significant reduction from baseline in 24-hour coughs per hour 4. To evaluate the efficacy of MK-7264 in improving self-rated cough severity;Primary end point(s): - 24-hour coughs per hour at Week 24 - Number of participants experiencing an adverse event (AE) - Number of participants discontinuing study intervention due to an AE;Timepoint(s) of evaluation of this end point: Week 24 (Efficacy) Throughout study (Safety) | — |
Secondary
| Measure | Time frame |
|---|---|
| Secondary end point(s): - Awake coughs per hour at Week 24 - Proportion of participants with a =1.3 point increase from baseline in LCQ total score at Week 24 - Proportion of participants with a =30% reduction from baseline in 24-hour coughs per hour at Week 24 - Proportion of participants with a =1.3 point reduction from baseline in mean weekly Cough Severity Diary (CSD) total score at Week 24 - Proportion of participants with a =2.7 point reduction from baseline in mean weekly CSD total score at Week 24 - Proportion of participants with =30 mm reduction from baseline in Cough Severity Visual Analog Scale (VAS) score at Week 24;Timepoint(s) of evaluation of this end point: Week 24 | — |
Countries
Australia, Canada, China, Colombia, Czech Republic, Denmark, Germany, Guatemala, Hungary, Italy, Malaysia, New Zealand, Peru, Poland, South Africa, Turkey, Ukraine, United Kingdom, United States
Outcome results
None listed