732
Participants
Start Date
March 14, 2018
Primary Completion Date
June 5, 2020
Study Completion Date
August 17, 2020
Placebo
Participants receive dose-matched placebo tablets orally BID during the 12-week main study period and during the 40-week extension period.
Gefapixant
Gefapixant 15 mg or 45 mg tablet administered orally BID during the 12-week main study period and during the 40-week extension period, according to randomization.
Taichung Veterans General Hospital ( Site 2401), Taichung
Erzsebet Gondozohaz ( Site 1207), Gödöllő
Dr Kenessey Albert Korhaz-Rendelointezet ( Site 1200), Balassagyarmat
Herlev Hospital ( Site 0803), Herlev
CRU Hungary KFT ( Site 1205), Miskolc
Synexus Magyarorszag Kft. ( Site 1210), Gyula
CCBR AS Vejle, Center for Clinical & Basic Research ( Site 0801), Vejle
CCBR AS Aalborg, Center for Clinical & Basic Research ( Site 0802), Aalborg
Petz Aladar Megyei Oktato Korhaz ( Site 1206), Győr
National Taiwan University Hospital ( Site 2400), Taipei
Hopital Nord du Marseille ( Site 0910), Marseille
Hallym University Sacred Heart Hospital ( Site 2208), Anyang-si
Clinica Ricardo Palma ( Site 1802), San Isidro
Asociacion Civil por la Salud ( Site 1805), Lima
Hospital Chancay y Servicios Basicos de Salud ( Site 1810), Lima
Hospital Clinico Universitario de Santiago ( Site 2303), Santiago de Compostela
Ajou University Hospital ( Site 2211), Suwon
Chang Gung Medical Foundation - Keelung Branch ( Site 2404), Keelung
"Private Small-Scale Enterprise Medical Centre Pulse ( Site 2815)", Vinnytsia
Incheon St. Mary s Hospital ( Site 2200), Incheon
Far Eastern Memorial Hospital ( Site 2402), New Taipei City
Charlottesville Medical Research Center, LLC ( Site 0006), Charlottesville
Lung and Sleep Specialists ( Site 0091), Williamsburg
Pulmonary Associates of Richmond Inc. ( Site 0101), Richmond
National Clinical Research-Richmond, Inc. ( Site 0073), Richmond
Wonju Severance Christian Hospital ( Site 2214), Wŏnju
Hospital General Universitario Gregorio Maranon ( Site 2309), Madrid
Clinical Research of Gastonia ( Site 0043), Gastonia
American Health Research ( Site 0082), Charlotte
Hopital Cavale Blanche ( Site 0909), Brest
CHU de Toulouse - Hopital Larrey ( Site 0900), Toulouse
Florida Pulmonary Research Institute, LLC ( Site 0019), Winter Park
Well Pharma Medical Research, Corp. ( Site 0093), Miami
Sher Allergy Specialists/Center For Cough ( Site 0078), Largo
Yedikule Gogus Hast. ve Gogus Cer. Egitim ve Arastirma Hastanesi ( Site 2601), Istanbul
I.U. Cerrahpasa Tip Fakultesi Gogus Hastaliklari Anabilim Dali ( Site 2600), Fatih
Hopital Arnaud de Villeneuve ( Site 0905), Montpellier
Kocaeli Universitesi Tip Fakultesi ( Site 2611), Kocaeli
CHU Hotel Dieu Nantes ( Site 0906), Nantes
Bernstein Clinical Research Center, LLC ( Site 0005), Cincinnati
Changhua Christian Hospital ( Site 2403), Changhua
Ondokuz Mayis Universitesi Tip Fakultesi Hastanesi ( Site 2606), Samsun
Recep Tayyip Erdogan Universitesi Tip Fakultesi Egitim ve Aras. Has ( Site 2620), Rize
Clinical Research Institute LLC ( Site 0004), Minneapolis
Midwest Allergy Sinus Asthma, SC ( Site 0081), Normal
The Center for Pharmaceutical Research PC ( Site 0016), Kansas City
City Polyclinic N20 ( Site 2822), Odesa
Cotton-O'Neil Clinical Research Center ( Site 0052), Topeka
BreatheAmerica Inc ( Site 0048), Shreveport
Vital Prospects Clinical Research Institute, PC ( Site 0037), Tulsa
Pharmaceutical Research & Consulting, Inc. ( Site 0029), Dallas
Allergy & Asthma Center ( Site 0001), Waco
Mainland Medical Research Institute ( Site 0003), Dickinson
Diagnostics Research Group ( Site 0035), San Antonio
Sirius Clinical Research, LLC ( Site 0102), Austin
Intermountain Clinical Research ( Site 0033), Draper
Medical Research of AZ ( Site 0060), Scottsdale
Research Solutions of Arizona PC ( Site 0036), Litchfield Park
Center for Clinical Trials, LLC ( Site 0059), Paramount
Biosolutions Clinical Research Center ( Site 0070), La Mesa
Carmel Medical Center ( Site 1305), Haifa
Hillel Yaffe Medical Center ( Site 1303), Hadera
Meir Medical Center ( Site 1301), Kfar Saba
Rabin Medical Center ( Site 1302), Petah Tikva
Chaim Sheba Medical Center. ( Site 1304), Ramat Gan
Asthma Nasal Disease & Allergy Research Center of New England ( Site 0075), East Providence
InAER Investigaciones en Alergia y Enfermedades Respiratorias ( Site 0324), Caba
Fundacion CIDEA ( Site 0323), Ciudad de Buenos Aires
Instituto Ave Pulmo ( Site 0322), Mar del Plata
Centro Medico Privado de Reumatologia ( Site 0309), San Miguel de Tucumán
Investigaciones en Patologias Respiratorias ( Site 0325), San Miguel de Tucumán
CEMEDIC - Centro de Especialidades Medicas ( Site 0304), Buenos Aires
Centro Medico Dra De Salvo ( Site 0310), Buenos Aires
Hospital Privado Universitario de Cordoba ( Site 0313), Córdoba
Fundacion Scherbovsky ( Site 0300), Mendoza
Canadian Phase Onward Inc. ( Site 0509), Toronto
Recherche GCP Research ( Site 0500), Montreal
167877 Canada Inc. Dr. Jaime Del Carpio ( Site 0506), Montreal
Dynamik Research ( Site 0505), Pointe-Claire
Diex Recherche Quebec Inc ( Site 0515), Québec
Q & T Research Sherbrooke Inc. ( Site 0512), Sherbrooke
CIC Mauricie Inc. ( Site 0503), Trois-Rivières
MUDr. I. Cierna Peterova s.r.o. ( Site 0707), Brandýs nad Labem
Plicni ambulance ( Site 0701), Rokycany
Plicni stredisko Teplice s. r. o ( Site 0700), Teplice
Pneumologie Varnsdorf S.R.O. ( Site 0706), Varnsdorf
National Hospital Organization Nagoya Medical Center ( Site 1539), Nagoya
Nagoya City University Hospital ( Site 1528), Nagoya
National Hospital Organization Ehime Medical Center ( Site 1556), Tōon
Idaimae Minamiyojo Int Clinic ( Site 1521), Sapporo
Terada Clinic Respiratory Medicine & General Practice ( Site 1565), Himeji
Kinki Central Hospital ( Site 1576), Itami
Itami City Hospital ( Site 1580), Itami
National Hospital Organization Ibarakihigashi National Hospital ( Site 1526), Naka-gun
Ishikawa Prefectural Central Hospital ( Site 1554), Kanazawa
Kanazawa University Hospital ( Site 1536), Kanazawa
Komatsu Municipal Hospital ( Site 1508), Komatsu
Kamei Internal Medicine and Respiratory Clinic ( Site 1509), Takamatsu
Fujisawa City Hospital ( Site 1505), Fujisawa
Yokohama City Minato Red Cross Hospital ( Site 1506), Yokohama
Medical Corporation Shintokai Yokohama Minoru Clinic ( Site 1568), Yokohama
Saiseikai Yokohamashi Nanbu Hospital ( Site 1533), Yokohama
Kanagawa Cardiovascular and Respiratory Center ( Site 1503), Yokohama
Matsusaka City Hospital ( Site 1525), Matsusaka
Nagaoka Red Cross Hospital ( Site 1507), Nagaoka
National Hospital Organization Minami-Okayama Medical Center ( Site 1553), Tsukubo-gun
Urasoe General Hospital ( Site 1572), Urasoe
Osaka Habikino Medical Center ( Site 1546), Habikino
Kawaguchi Respiratory Clinic ( Site 1504), Higashiosaka
National Hospital Organization Kinki-chuo Chest Medical Center ( Site 1519), Sakai
Tokyo Medical University Hachioji Medical Center ( Site 1569), Hachiōji
National Hospital Organization Tokyo National Hospital ( Site 1557), Kiyose
National Hospital Organization Disaster Medical Center ( Site 1558), Tachikawa
Shimonoseki City Hospital ( Site 1573), Shimonoseki
National Hospital Organization Fukuoka Hospital ( Site 1552), Fukuoka
Hiroshima Allergy & Respiratory Clinic ( Site 1529), Hiroshima
Kyoto University Hospital ( Site 1547), Kyoto
JA Niigatakoseiren Niigata Medical Center ( Site 1522), Niigata
Shizuoka Prefectural Hospital Organization Shizuoka General Hospital ( Site 1524), Shizuoka
Juntendo University Hospital ( Site 1578), Tokyo
Tokyo Shinagawa Hospital ( Site 1560), Tokyo
Showa University Hospital ( Site 1531), Tokyo
Center Hospital of the National Center for Global Health and Medicine ( Site 1574), Tokyo
Tokyo Metropolitan Geriatric Hospital ( Site 1577), Tokyo
Hospital Nacional Adolfo Guevara Velasco ( Site 1808), Cusco
Prywatny Gabinet Internistyczno ( Site 1928), Bialystok
Centrum Medycyny Oddechowej Mroz Spolka Jawna ( Site 1918), Bialystok
Centrum Medyczne Pratia Bydgoszcz ( Site 1418), Bydgoszcz
Centrum Medyczne Pratia Czestochowa ( Site 1926), Częstochowa
Centrum Medyczne Pratia Gdynia ( Site 1910), Gdynia
Specjalistyczny osrodek .All-Med. Grazyna Pulka ( Site 1919), Krakow
USK nr 1 ( Site 1921), Lodz
Prywatny Gabinet Specjalistyczny ( Site 1927), Lodz
NZOZCentrum Medyczne Kermed ( Site 1905), Żnin
Seoul National University Hospital ( Site 2210), Seoul
The Catholic University of Korea Eunpyeong St Mary s Hospital ( Site 2209), Seoul
Severance Hospital ( Site 2204), Seoul
Konkuk University Medical Center ( Site 2205), Seoul
Asan Medical Center ( Site 2203), Seoul
Samsung Medical Center ( Site 2212), Seoul
The Catholic University of Korea St. Mary s Hospital ( Site 2215), Seoul
Korea University Guro Hospital ( Site 2213), Seoul
Hospital Clinic ( Site 2302), Barcelona
Hospital Parc Tauli ( Site 2308), Sabadell
Hacettepe Universitesi Tip Fakultesi Hastanesi ( Site 2613), Ankara
F.G.Yanovskyy Institute of Phthisiology and Pulmonology ( Site 2830), Kyiv
Royal Preston Hospital ( Site 2709), Preston
Medinova Lakeside Dedicated Research Centre ( Site 2710), Corby
Belfast City Hospital ( Site 2705), Belfast
Broomfield Hospital ( Site 2722), Chelmsford
Glenfield Hospital ( Site 2701), Leicester
Royal Brompton Hospital ( Site 2703), London
Wythenshawe Hospital ( Site 2700), Manchester
Churchill Hospital ( Site 2706), Oxford
Rothwell Medical Centre ( Site 2712), Rothwell
MeDiNova Yorkshire Dedicated Research Centre ( Site 2708), Shipley
Merck Sharp & Dohme LLC
INDUSTRY