499
Participants
Start Date
December 15, 2020
Primary Completion Date
June 21, 2024
Study Completion Date
June 21, 2024
MK-8189
MK-8189 administered QD at a dose of 8 mg, 16 mg, or 24 mg via oral tablet.
Risperidone
Risperidone administered QD at a dose of 6 mg via oral capsule.
Placebo to MK-8189
MK-8189-matching placebo administered QD via oral tablet.
Placebo to risperidone
Risperidone-matching placebo administered QD via oral capsule.
National Taiwan University Hospital ( Site 9001), Taipei
Taipei City Hospital, Songde Branch ( Site 9004), Taipei
Chang Gung Memorial Hospital - Linkou Branch ( Site 9002), Taoyuan District
China Medical University Hospital ( Site 9006), Taichung
Center for Mental Health Prof. Nikola Shipkovenski Ltd ( Site 3000), Sofia
"State Psychiatric Hospital Sv. Ivan Rilski, Novi Iskar ( Site 3001)", Novi Iskar
Piejuras Slimnica Psihiatriska Klinika ( Site 8001), Liepāja
Mental Health Center - Veliko Tarnovo ( Site 3006), Veliko Tarnovo
Daugavpils Psihoneirologiska Slimnica ( Site 8005), Daugavpils
State Psychiatric Hospital - Kardzhali ( Site 3005), Kardzhali
Mental Health Center - Ruse, EOOD ( Site 3003), Rousse
Mental Health Center Prof. Dr. Ivan Temkov - Burgas EOOD ( Site 3002), Burgas
Klinika za psihijatriju Vrapce ( Site 4000), Zagreb
Klinika za psihijatriju Vrapce ( Site 4001), Zagreb
Klinika za psihijatriju Sveti Ivan ( Site 4003), Zagreb
Richmond Behavioral Associates ( Site 1064), Staten Island
Clinical Center of Serbia ( Site 5101), Belgrade
Clinical Center of Serbia ( Site 5107), Belgrade
Institut za mentalno zdravlje ( Site 5105), Belgrade
"University Clinical Hospital Center Dr. Dragisa Misovic - Dedinje ( Site 5104)", Belgrade
Taipei Veterans General Hospital ( Site 9000), Taipei
CNE Cherkasy reg. psychiatric hospital of Cherkasy regional council ( Site 7009), Smila
CBH Health ( Site 1044), Gaithersburg
"CNE Vinnytsia Regional Clinical Psycho-neurological hospita-Mixed (men and women) department #2 ( S", Vinnytsia
Special Hospital for Psychiatric Diseases Kovin ( Site 5108), Kovin
Special Hospital for Psychiatric Diseases Kovin ( Site 5109), Kovin
New Hope Clinical Research ( Site 1050), Charlotte
CenExel iResearch, LLC ( Site 1039), Decatur
Atlanta Center For Medical Research ( Site 1022), Atlanta
Behavioral Clinical Research , Inc ( Site 1013), Miami Lakes
Behavioral Clinical Research ( Site 1058), Hollywood
Research Centers of America ( Hollywood )-Central Nervous System (CNS) ( Site 1065), Hollywood
Premier Clinical Research Institute ( Site 1049), Miami
Fort Lauderdale Behavioral Health Center ( Site 1028), Oakland Park
Clinical Center Kragujevac ( Site 5100), Kragujevac
Clinical Center Kragujevac ( Site 5102), Kragujevac
Clinical Center Kragujevac ( Site 5106), Kragujevac
Health Synergy Clinical Research ( Site 1051), Stuart
Kyungpook National University Hospital ( Site 0601), Daegu
Neuro-Behavioral Clinical Research ( Site 1055), North Canton
Midwest Clinical Research ( Site 1059), Dayton
Midwest Clinical Research Center ( Site 1033), Dayton
Inje University Busan Paik Hospital ( Site 0604), Busan
Dnepropetrovsk Regional Clinical Hospital Mechnikov-Regional Centre of Psychosomatic Disorders base, Dnipro
Klinicki bolnicki centar Rijeka ( Site 4005), Rijeka
Ascension Saint Elizabeth ( Site 1000), Chicago
Uptown Research Institute ( Site 1052), Chicago
Pillar Clinical Research, LLC ( Site 1038), Chicago
CNE of Kharkiv Reg. Council Reg. Clinical Psychiatric Hospital Nub 3 ( Site 7012), Kharkiv
Institute of Neurology,Psychiatry and Narcology AMS Ukraine ( Site 7011), Kharkiv
Arch Clinical Trials ( Site 1048), St Louis
Benchmark Research ( Site 1054), Shreveport
Woodland International Research Group, LLC ( Site 1002), Little Rock
Woodland Research Northwest, LLC ( Site 1036), Rogers
CNE. Kherson Regional Psychiatric Hospital ( Site 7004), Kherson
Pillar Clinical Research, LLC ( Site 1004), Richardson
"CNE Precarpathian Regional Clinical Center of Mental Health of Ivano-Frankivsk Regional Council (", Ivano-Frankivsk
Community Clinical Research ( Site 1057), Austin
Altea Research Institute ( Site 1012), Las Vegas
ProScience Research Group ( Site 1046), Culver City
CITRIALS ( Site 1010), Bellflower
Behavioral Research Specialists, LLC ( Site 1032), Glendale
Schuster Medical Research Institute ( Site 1023), Sherman Oaks
Artemis Institute for Clinical Research ( Site 1019), San Diego
California Neuropsychopharmacology Clinical Research Institute, LLC (CNRI-San Diego, LLC) ( Site 103, San Diego
CITRIALS ( Site 1016), Riverside
Collaborative Neuroscience Research, LLC ( Site 1041), Garden Grove
Moscow Scientific Research Institute for Psychiatry ( Site 6013), Moscow
Psychiatric Clinical Hospital 4 named after PB Gannushkin ( Site 6016), Moscow
Psychiatric Clinical Hospital 4 named after PB Gannushkin-Psychiatric department 4 ( Site 6023), Moscow
Central Moscow Regional Clinical Psychiatric Hospital ( Site 6018), Moscow
Yaroslavl Regional Clinical Psychiatry Hospital ( Site 6022), Yaroslavl
Arkhangelsk Regional Psychiatric Clinical Hospital ( Site 6020), Arkhangelsk
SGHI Leningrad Region Psyconeurology Dispensary ( Site 6017), Leningrad Region
Bekhterev Research Institute for Psychoneurology ( Site 6008), Saint Petersburg
SPb City Psychiatric Hospital #3 na II Skvortsov-Stepanov ( Site 6000), Saint Petersburg
SPb City Psychiatric Hospital #3 na II Skvortsov-Stepanov ( Site 6001), Saint Petersburg
SPb City Psychiatric Hospital #3 na II Skvortsov-Stepanov ( Site 6002), Saint Petersburg
Stavropol Region Psychiatric Hospital #2 ( Site 6005), Stavropol
Lipetsk Regional Psychoneurology Hospital ( Site 6021), Lipetsk
Federal State Scientific Institution Research Institute of Mental Health ( Site 6014), Tomsk
Institutul de Psihiatrie Socola ( Site 0810), Iași
Institutul de Psihiatrie Socola ( Site 0814), Iași
Seimou Hospital ( Site 2004), Tomioka
Shiranui Hospital ( Site 2043), Omuta
National Hospital Organization Hizen Psychiatric Medical Center ( Site 2017), Kanzaki-gun
Pillar Clinical Research ( Site 1047), Bentonville
Massachusetts General Hospital ( Site 1035), Boston
Hassman Research Institute Marlton Site ( Site 1040), Marlton
Seishinkai Okehazama Hospital Fujita Kokoro Care Center ( Site 2011), Toyoake
Kohnodai Hospital, National Center for Global Health and Medicine ( Site 2005), Ichikawa
Wakato Hospital ( Site 2031), Kitakyushu
Soushu Hospital ( Site 2008), Atsugi
Tanzawa Hospital ( Site 2037), Hadano
Kanagawa Psychiatric Center ( Site 2035), Yokohama
Komoro Kogen Hospital ( Site 2046), Komoro
National Hospital Organization Ryukyu Hospital ( Site 2019), Kunigamigun
Amekudai Hospital ( Site 2020), Naha
Rainbow and Sea Hospital ( Site 2016), Karatsu
Ongata Hospital ( Site 2007), Hachiōji
Nishigahara Hospital ( Site 2042), Kita-ku
National Center of Neurology and Psychiatry ( Site 2023), Kodaira
Chiba University Hospital ( Site 2024), Chiba
Inokuchi Noma Hospital ( Site 2030), Fukuoka
Kuramitsu Hospital ( Site 2014), Fukuoka
Yuge Hospital ( Site 2018), Kumamoto
Seijin Hospital ( Site 2026), Tokyo
Narimasu Kosei Hospital ( Site 2006), Tokyo
Centrum Medyczne HCP ( Site 0913), Poznan
Klinika Psychiatryczna Wydzialu Nauki o Zdrowiu WUM ( Site 0900), Pruszków
Samodzielny Wojewódzki Zespół Publicznych Zakładów Psychiatrycznej Opieki Zdrowotnej w Warszawie ( S, Warsaw
Uniwersyteckie Centrum Kliniczne ( Site 0902), Gdansk
Specjal. Psychiatryczny ZOZ w Lodzi, Szpital im. Babinskiego ( Site 0905), Lodz
Prof. Dr. Alexandru Obregia Psychiatry Hospital ( Site 0815), Bucharest
Prof. Dr. Alexandru Obregia Psychiatry Hospital ( Site 0816), Bucharest
Prof. Dr. Alexandru Obregia Psychiatry Hospital ( Site 0817), Bucharest
Prof. Dr. Alexandru Obregia Psychiatry Hospital ( Site 0818), Bucharest
Seoul National University Hospital ( Site 0600), Seoul
Kyiv City Psychoneurological Hospital 2 ( Site 7008), Kyiv
CNE Clinical Hospital PSYCHIATRY of executive body of Kyiv City Council -Kyiv City State Admin ( Sit, Kyiv
MNE of KRC-Regional psychiatric and narcological medical association ( Site 7005), Kyiv
Merck Sharp & Dohme LLC
INDUSTRY