SchizophreniaPhase 3NCT03121586
Extension Study of Pimavanserin for the Adjunctive Treatment of Schizophrenia
A Phase 3 study testing Pimavanserin in people with Schizophrenia, run by ACADIA Pharmaceuticals Inc. at 161 sites in 14 countries.
Trial summary
To evaluate the long-term safety and tolerability of pimavanserin after 52 weeks of adjunctive treatment in subjects with schizophrenia Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Schizophrenia
- What is being tested?
- Pimavanserin
- Type of treatment
- Pill or oral medicine
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 995 participants
- Where
- 161 sitesin 14 countries
- Study dates
- Jan 2017to 30 May 2024
- Phase
- Phase 3
- Are there results?
- Yes, posted in the registrySummary in the doctors' view
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Patient is able to understand and provide signed informed consent
- Has a caregiver or some other identified responsible person (e.g., family member, social worker, caseworker, or nurse) considered reliable by the Investigator in providing support to the subject to help ensure compliance with study treatment, study visits, and protocol procedures and who is also able to provide input helpful for completing study rating scale
- Is completing the Week 6 visit in Study ACP-103-034 or the Week 26 visit in Study ACP-103-038 or 064 while continuing to take his/her assigned dose of blinded study drug and may, in the Investigator's opinion, benefit from continued adjunctive treatment with pimavanserin to a antipsychotic
- If the subject is female, she must not be pregnant or breastfeeding. She must also be of non-childbearing potential (defined as either surgically sterilized or at least 1 year postmenopausal) or must agree to use two clinically acceptable methods of contraception
- The main background antipsychotic with which the subject is being treated must continue to be on one of the antipsychotics listed below:
- Aripiprazole
Show all 23Show fewer
- Aripiprazole long-acting injectables:
- Abilify Maintena®
- Aristada®
- Asenapine
- Risperidone
- Risperidone long-acting injection
- Olanzapine
- Paliperidone extended release (ER) (≤9 mg)
- Paliperidone palmitate
- Invega Sustenna® (≤156 mg)
- Invega Trinza® (≤546 mg)
- Trevicta® (≤350 mg)
- Xeplion® (≤100 mg)
- Lurasidone
- Cariprazine
- Brexpiprazole
- Asenapine
Who cannot join
- Patient is judged by the Investigator or the Medical Monitor to be inappropriate for the study (e.g., significantly noncompliant in Studies ACP-103-034, -038, or -064)
- A urine drug screen (UDS) result at Baseline that indicates the presence of any tested prohibited substance of potential abuse
- Subjects from Studies 034 and 038 with a result indicating the presence of marijuana are permitted, if allowed by medical regulations, if they agree to abstain from marijuana use during the study and the medical monitor approves the subject's participation
- Subjects from Study 064 with a result indicating the presence of marijuana are not permitted in the study
- Is taking a medication or drug or other substance that is prohibited according to this protocol
- Known family or personal history or symptoms of long QT syndrome or risk factors for torsade de pointes and/or sudden death, including symptomatic bradycardia, hypokalemia or hypomagnesemia, and the presence of congenital prolongation of the QT interval
- Patient has current evidence of a serious and/or unstable psychiatric, neurologic, cardiovascular, respiratory, gastrointestinal, renal, hepatic, hematologic, or other medical disorder, including cancer or malignancies, which would affect the patient's ability to participate in the study.
- Patients will be evaluated at screening to ensure that all criteria for study participation are met. Patients may be excluded from the study based on these assessments (and specifically if it is determined that their baseline health and psychiatric condition do not meet all pre-specified entry criteria).
Trial locations and contacts
161 sites in 14 countries.
161 sites in 14 countries
United States32 sites
153-Albuquerque Neuroscience Inc.
Albuquerque, New Mexico, 87109
162-Synexus Clinical Research, Inc.
Atlanta, Georgia, 30328
168-Atlanta Center for Medical Research
Atlanta, Georgia, 30331
167-CITrials - Bellflower
Bellflower, California, 90706
141-Hassman Research Institute
Berlin, New Jersey, 08009
104-Neurobehavioral Research, Inc.
Cedarhurst, New York, 11516
106-New Hope Clinical Research
Charlotte, North Carolina, 28211
114-Northwestern University
Chicago, Illinois, 60611
101-American Medical Research
Chicago, Illinois, 60612
105-ProScience Research Group
Culver City, California, 90230
170-Suburban Research Associates
Downingtown, Pennsylvania, 19335
145-Carolina Behavioral Care
Durham, North Carolina, 27704
125-Galiz Research
Hialeah, Florida, 33016
130-Alexian Brothers Center for Psychiatric Research
Hoffman Estates, Illinois, 60169
127-University Hills Clinical Research
Irving, Texas, 75062
140-Synexus Clinical Research, Inc - 140
Jamaica, New York, 11432
118-Lake Charles Clinical Trials
Lake Charles, Louisiana, 70629
124-Altea Research Institute
Las Vegas, Nevada, 89102
137-Innovative Clinical Research, Inc.
Lauderhill, Florida, 33319
123-Synergy San Diego
Lemon Grove, California, 91945
156-Woodland International Research Group, LLC
Little Rock, Arkansas, 72211
102-Northwest Behavioral Research Center
Marietta, Georgia, 30060
146-Premier Clinical Research Institute, Inc.
Miami, Florida, 33122
110-Cutting Edge Research Group
Oklahoma City, Oklahoma, 73116
171-Alea Research Institute
Phoenix, Arizona, 85012
103-Pillar Clinical Research, LLC
Richardson, Texas, 75080
128-Finger Lakes Clinical Research
Rochester, New York, 14618
111-Woodland Research Northwest, LLC
Rogers, Arkansas, 72758
115-Psychiatric and Behavioral Solutions LLC
Salt Lake City, Utah, 84105
164-Artemis Institute for Clinical Research
San Diego, California, 92103
165-CITrials
Santa Ana, California, 92705
108-Collaborative Nueroscience Network, LLC
Torrance, California, 90502
Russia24 sites
418-State Budget Healthcare Institution of Arkhangelsk Region "Arkhangelsk Clinical Psychiatric Hospital"
Arkhangelsk, 163530
459-Federal State Budgetary Research Institution "Mental Health Science Center"
Moscow, 115522
573-SBIH of Moscow "Psychiatric Clinical Hospital # 4 n.a. P.B. Gannushkin" Short name: PCH N4 n.a. P.B.Gannushkin
Moscow
581-SBIH of Moscow "Psych Clinical Hospital #1 N.A. Alekseev"
Moscow
505-GUZ Lipetsk Regional psychoneurological Hospital #1
Plekhanovo, Lipetsk Oblast, 399313
419-State municipal healthcare Institution "Leningrad region psychoneurological center"
Saint Petersburg, 188820
415-Saint-Petersburg State Healthcare Institution "Saint Nicolas Wonderworker Psychiatric Hospital"
Saint Petersburg, 190121
571-St. Petersburg SHI "Psychoneurological Dispensary #10"
Saint Petersburg, 190121
451-V. M. Bekhterev National Research Medical Center For Psychiatry and Neurology
Saint Petersburg, 192019
453-"Saint-Petersburg Scientific Research Psychoneurological Institute n.a. V.M. Bekhterev"
Saint Petersburg, 192019
465-"Saint-Petersburg Scientific Research Psychoneurological Institute N.A. V.M. Bekhterev"
Saint Petersburg, 192019
495-FSBI "National Medical Scientifi Center of Psychiatry and Neurology n.a. V.M. Bekhterev" MoH
Saint Petersburg, 192019
464-Saint Petersburg State Budget Healthcare Institution "City Psychiatric Hospital No. 6 (Inpatient Department with Treatment Center)"
Saint Petersburg, 193167
443-Saint-Petersburg State Budget Healthcare Institution "Psychoneurological Center #5"
Saint Petersburg, 195112
444-SPHI "City Mental Hospital #3 n.a. I.I Skvortsov-Stepanov"
Saint Petersburg, 197341
452-Saint Petersburg State Public Institution of Healthcare "City Psychiatric Hospital #3 n.a.I.I. Skvortsov-Stepanov
Saint Petersburg, 197341
496-SPHI "City Mental Hospital #3 n.a. I.I Skvortsov-Stepanov
Saint Petersburg, 197341
458-State Budget Healthcare Institution "Samara Psychiatric Hospital"
Saint Petersburg, 443016
416-FSBEI HE "Smolensk State Medical University" of the MoH of the RF
Smolensk, 214019
420-"Podderzhka" Research and Educational Center of Psychotherapy Limited Liability Company
Stavropol, 355000
572-Klinika StoLet" Ltd.
Tomsk
417-State Budget Healthcare Institution of Stavropol Region (Regional Specialized Psychiatric Hospital #2)
Tonnel’nyy, Stavropol Kray, 357034
466-OOO "Lion-Med"
Voronezh, 394024
422-State Budget Healthcare Institution of Yaroslavl Region "Yaroslavl Region Clinical Psychiatric Hospital"
Yaroslavl, 150003
Bulgaria22 sites
454-Mental Health Centre 'Prof. Dr. Ivan Temkov', EOOD
Burgas, 8000
533-State Psychiatric Hospital - Kardzhali, EOOD
Kardzhali, 6600
532-MHAT "Dr. Hristo Stambolski", EOOD
Kazanlak
569-State Psychiatric Hospital - Lovech
Lovech, 5500
406-State Psychiatric Hospital - Pazardzhik AD
Pazardzhik, 4400
535-UMHAT 'Dr. Georgi Stranski', EAD
Pleven
586-Medical Center Mentalcare OOD
Plovdiv, 4004
563-MC-Hipokrat-N E00D
Plovdiv, 4028
403-University Multiprofile hospital for activated treatment Sveti Georgi, Clinic of psychiatry
Plovdiv
592-Medical center Spectar - Plovdiv EOOD
Plovdiv
570-Medical Centre "Sveti Naum"
Sofia, 1113
497-MHC - Sofia, EOOD
Sofia, 1202
526-DCC "Sv. Vrach and Sv. Sv. Kuzma and Damyan", OOD
Sofia, 1408
402-Military Medical Academy, Multiprofile Hospital for Actie Treatment - Sofia
Sofia, 1431
405-UMHAT "Alexandrovska" EAD
Sofia, 1431
568-Medical Center Hera EOOD
Sofia, 1510
528-Medical Center Intermedica, OOD
Sofia, 1680
404-MHAT-Targovishte, AD
Targovishte, 7700
590-State Psychiatric Hospital - Tzarev Brod
Tsarev Brod
498-DCC "Mladost M" - Varna, OOD
Varna, 9020
455-Mental Health Center - Veliko Tarnovo EOOD
Veliko Tarnovo, 5000
401-Mental Health Center-Vratsa EOOD
Vratsa, 3000
Ukraine19 sites
462-Communal Establishment "I.I. Mechnykov Dnipropetrovsk Regional Clinical Hospital"
Dnipro, 49005
510-CI of Kyiv RC Regional Psychiatric-Narcological Medical Association, Depart #10 (male), Dept #2 (female)
Hlevakha, 08631
433-SI "Institute of Neurology, Psychiatry and Narcology of National Academy of Medical Sciences of Ukraine"
Kharkiv, 61068
434-State Institution "Institute of Neurology, Psychiatry and Narcology of NAMS of Ukraine", Department of Urgent Psychiatry and Narcology
Kharkiv, 61068
582-SI Institute of Neurology,Psychiatry&Narcology of NAMSU
Kharkiv, 61068
567-CIH Kharkiv Regional Clinical Psychiatric Hospital #3 Psychiatric Department of Primary Psychotic Episod Short Site name: CIH KRCPH #3 PD of PPE
Kharkiv
461-Kherson Regional Psychiatric Hospital
Kherson, 73488
507-Main Military Clinical Hospital of MDU
Kyiv, 01133
447-Ukrainian Scientific Research Institute of Social and Forensic Psychiatry and Narcology of Ministry of Healthcare of Ukraine
Kyiv, 04080
Kyiv Regional Medical Incorporation Psychiatry Center of Novel Treatment and Rehabilitation of Psychotic Disorders, Department #29, Department #30
Kyiv, 04080
460-Kyiv City Psychoneurological Hospital #3, General Psychiatry Department No. 2
Kyiv, 08631
435-Kyiv Regional Medical Incorporation "Psychiatry". Center of Novel Treatment and Rehabilitation of Psychotic disorders, build 5, Department #30
Kyiv
564-Regional Clinical Psychiatric Hospital
Nove
438-Communal Establishment "Odesa Regional Psychiatric Hospital #2"
Odesa, Oblast, 67513
509-CI Odesa Regional Medical Centre of Mental Health
Odesa, 65014
508-CI Cherkasy Regional Psychiatric Hospital of ChRC Female Dept #11, Male Dept #12
Smila, 20708
591-Municipal non-profit enterprise "Transcarpathian Regional Medical Center of Mental Health and Medicine of Addictions" of the Transcarpathian Regional Council, Department of psychiatry
Uzhhorod
Communal Establishment "Acad. O.I. Iushchenko Vinnytsia Regional Psychoneurologic Hospital"
Vinnytsia, 21005
432-Municipal Institution "Vinnytsya Regional Psychoneurological Hospital n.a. Acad. O.I. Yushchenko", Male Department No 14, Female Department No 15, Vinnytsya National Medical University n.a. M.I. Pyrogov, Dept of Psychiatry, Narcology and Psychothera
Vinnytsia
Serbia15 sites
428-Clinical center of Serbia
Belgrade, 11 000
424-Institute of Mental health
Belgrade, 11000
425-Clinical Hospital Center "Dr. Dragisa Misovic-Dedinje", Clinic of Psychiatry
Belgrade, 11000
471-Clinic for Psychiatric Diseases "Dr Laza Lazarevic"
Belgrade, 11000
524-General Hospital Euromedik
Belgrade, 11000
587-Institute of Mental Health
Belgrade, 11000
584-Clinic for Psychiatry, Clinical Canter of Serbia
Belgrade
472-Special Hospital for Psychiatric Diseases "Kovin"
Kovin, 26220
493-Special Neuropsychiatric Hospital Kovin
Kovin, 26220
423-Clinical Center Kragujevac
Kragujevac, 34 000
429-Clinical Center Kragujevac, Clinic of Psychiatry
Kragujevac, 34 000
430-Psychiatric Clinic, Clinical Center Kragujevac
Kragujevac
427-Clinical Center Nis, Clinic of Mental Health
Niš, 18 000
585-Special Hospital for Psychiatric Diseases "Gornja Toponica"
Niš
593-Specialized Hospital for Neuropsychiatric Diseases "Sveti Vracevi"
Novi Kneževac
Argentina11 sites
610-Clinica Privada Banfield S.A.
Buenos Aires
625-NOVAIN Neurociencias Group
Buenos Aires
603-Fundación para el Estudio y Tratamiento de las Enfermedades Mentales - FETEM
Ciudad Autonoma Buenos Aires
601-CENydET- Centro Neurobiologico y de Estres Traumatico-Biopsychomedical Research Group SRL
Ciudad Autonoma de Buenos Aire
602-FunDamoS
Ciudad Autonoma de Buenos Aire
622-Instituto Medico Damic Srl
Córdoba
624-Centro Especializado en Neurociencias CEN
Córdoba
626-Sanatorio Prof. Leon S. Morra S.A.
Córdoba
617-INSA Instituto de Neurociencias San Agustin S.A.
La Plata
623-Clinica Privada de Salud Mental Santa Teresa de Avila
La Plata
607-Resolution Psicopharmacology Research Institute
Mendoza
Spain8 sites
476-FIDMAG Germanes Hospitalaries
Barcelona, 08830
574-Hospital Clinic de Barcelona
Barcelona
588-Institucion Hospitalaria Hestia Palau - Ensayos clinicos
Barcelona
475-Hospital Gregorio Marañon
Madrid, 28007
575-Hospital Universitario 12 de Octubre
Madrid
494-CSM La Corredoria
Oviedo, 33011
431-Centro de Salud Parquesol, 2ª planta - Servicio de Psiquiatria
Valladolid, 47016
529-Hospital Provincial de Zamora
Zamora, 49021
Czechia6 sites
512-NeuropsychiatrieHK s.r.o.
Hradec Králové, 50341
583-Narodni ustav dusevniho zdravi
Klecany
519-A-SHINE s.r.o.
Pilsen, 31200
513-CLINTRIAL s.r.o.
Prague, 10000
499-MUDr. Tibor Miklos
Prague, 10600
511-Psychiatrie Ricany s.r.o.
Říčany, 25101
Croatia5 sites
536 - Clinic for psychiatry Vrapce
Zagreb
537 - Clinic for psychiatry Vrapce
Zagreb
550-Clinic for psychiatry Vrapce
Zagreb
557 - Clinic for psychiatry Vrapce
Zagreb
594-Klinika za psihijatriju Sveti Ivan, n/p Igor Filipčić or Marija Zelenika
Zagreb
Hungary5 sites
411-ÓBudai Egészségűgyi Centrum Kft
Budapest, Pest County, 1036
456-Semmelweis University Department of Psychiatry and Psychotherapy
Budapest, Pest County, 1083
520-Nyiro Gyula Korhaz - Orszagos Pszichiatriai es Addiktologiai Intezet
Budapest, 1135
410-Dr. Máthé és Társa Bt.
Kalocsa, Bács-Kiskun Megye, 6300
440-PsychoTech Kft.
Pécs, 7633
Poland5 sites
525-Podlaskie Centrum Psychogeriatrii
Bialystok, 15-756
502-Przychodnia Srodmiescie Sp. z o. o.
Bydgoszcz, 85-080
579-Centrum Badan Klinicznych P.I. House Sp. z o.o.
Gdansk, 80-546
501-Specjalistyczna Praktyka Lekarska Marek Domański
Lublin, 20-582
578-MSCZ im. Prof. J. Mazurkiewicza
Pruszków
Lithuania4 sites
483-Romuvos klinika, UAB
Kaunas, LT-44279
518-Kaunas City Outpatient Clinic, Public Institution
Kaunas, LT-48259
484-Medical Center Puriena JSC
Šilutė
517-Zirmunai Mental Health Center, Public Institution
Vilnius, 09112
Canada3 sites
Chatham-Kent Clinical Trials Research Ctr
Chatham, Ontario, N7L1C1
356-Chatham-Kent Clinical Trials Research Ctr
Chatham, N7L 1C1
351-McGill University Health Ctr Allan Memorial Int.
Montreal, Quebec, H3A 1A1
Italy2 sites
566-Ospedale San Raffaele (San Raffaele Turro)
Milan
553-AO Città della Salute e della Scienza di Torino
Torino
About this study
Official title: A 52-Week, Open-Label, Extension Study of Pimavanserin for the Adjunctive Treatment of Schizophrenia
To evaluate the long-term safety and tolerability of pimavanserin after 52 weeks of adjunctive treatment in subjects with schizophrenia
- Conditions
- Schizophrenia
- Being tested
- Pimavanserin
- Medical subject headings
- Schizophrenia
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
PimavanserinDrug
Pimavanserin 10 mg, tablet, taken as one 10 mg tablets, once daily by mouth, OR Pimavanserin 20 mg, tablet, taken as two 10 mg tablets, once daily by mouth, OR Pimavanserin 34 mg, tablet, taken as two 17 mg tablets, once daily by mouth
| Study group | Role | What they receive |
|---|---|---|
| Drug - Pimavanserin | Experimental | Pimavanserin 34 mg, 20 mg, or 10 mg, + background antipsychotic, taken once daily by mouth Receives: Drug: Pimavanserin |
What is being measured
The primary outcome is the main question the study is designed to answer.
Treatment Emergent Adverse Events
Number of patients with treatment emergent adverse events
Measured: Treatment period (52 weeks) and follow-up period (30 days): planned total of 56 weeks. Since the study was prematurely terminated, the reporting period was shortened; AEs were assessed to the end of treatment, at a mean duration of 319 days (or 46 weeks).
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted20 Apr 2017
- Study startJan 2017
- Primary completion30 Apr 2024
- Study completion30 May 2024
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Posted resultsParticipant flow, outcome measures and adverse events reported by the sponsor.
- Other trials for SchizophreniaStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 3
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 995 participants (actual)
Sponsor and investigators
- Lead sponsor
- ACADIA Pharmaceuticals Inc.
- Sponsor type
- Industry (pharma, biotech, devices)
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT03121586
- Sponsor's protocol ID
- ACP-103-035
- Other IDs
- 2016-003435-38, 2016
- Status last verified
- Jul 2025
- First submitted
- 13 Apr 2017
- Last updated
- 24 Aug 2025
- Results posted
- Yes, on ClinicalTrials.gov
- Data monitoring committee
- Yes
- FDA-regulated drug
- Yes
- FDA-regulated device
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 24 Aug 2025. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A 52-Week, Open-Label, Extension Study of Pimavanserin for the Adjunctive Treatment of Schizophrenia
- ClinicalTrials.gov ID
- NCT03121586
- Acronym / sponsor ID
- ACP-103-035
- Conditions
- Schizophrenia
- Phase
- Phase 3
- Study type
- Interventional
- Recruitment status
- Terminated
- Enrolment
- 995 participants (actual)
- Lead sponsor
- ACADIA Pharmaceuticals Inc.Industry (pharma, biotech, devices)
- Study start
- Jan 2017 (actual)
- Primary completion
- 30 Apr 2024 (actual)
- Study completion
- 30 May 2024 (actual)
- First posted
- 20 Apr 2017 (actual)
- Results
- Posted 24 Aug 2025
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
To evaluate the long-term safety and tolerability of pimavanserin after 52 weeks of adjunctive treatment in subjects with schizophrenia
Study design
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Drug - Pimavanserin | Experimental | Drug: PimavanserinPimavanserin 34 mg, 20 mg, or 10 mg, + background antipsychotic, taken once daily by mouth |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (23 listed)
- Patient is able to understand and provide signed informed consent
- Has a caregiver or some other identified responsible person (e.g., family member, social worker, caseworker, or nurse) considered reliable by the Investigator in providing support to the subject to help ensure compliance with study treatment, study visits, and protocol procedures and who is also able to provide input helpful for completing study rating scale
- Is completing the Week 6 visit in Study ACP-103-034 or the Week 26 visit in Study ACP-103-038 or 064 while continuing to take his/her assigned dose of blinded study drug and may, in the Investigator's opinion, benefit from continued adjunctive treatment with pimavanserin to a antipsychotic
- If the subject is female, she must not be pregnant or breastfeeding. She must also be of non-childbearing potential (defined as either surgically sterilized or at least 1 year postmenopausal) or must agree to use two clinically acceptable methods of contraception
- The main background antipsychotic with which the subject is being treated must continue to be on one of the antipsychotics listed below:
Key exclusion criteria (8 listed)
- Patient is judged by the Investigator or the Medical Monitor to be inappropriate for the study (e.g., significantly noncompliant in Studies ACP-103-034, -038, or -064)
- A urine drug screen (UDS) result at Baseline that indicates the presence of any tested prohibited substance of potential abuse
- Is taking a medication or drug or other substance that is prohibited according to this protocol
- Known family or personal history or symptoms of long QT syndrome or risk factors for torsade de pointes and/or sudden death, including symptomatic bradycardia, hypokalemia or hypomagnesemia, and the presence of congenital prolongation of the QT interval
- Patient has current evidence of a serious and/or unstable psychiatric, neurologic, cardiovascular, respiratory, gastrointestinal, renal, hepatic, hematologic, or other medical disorder, including cancer or malignancies, which would affect the patient's ability to participate in the study.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| PimavanserinPimavanserin 10 mg, tablet, taken as one 10 mg tablets, once daily by mouth, OR Pimavanserin 20 mg, tablet, taken as two 10 mg tablets, once daily by mouth, OR Pimavanserin 34 mg, tablet, taken as two 17 mg tablets, once daily by mouth | Drug | Drug - Pimavanserin |
Primary outcome
Treatment Emergent Adverse Events
Time frame: Treatment period (52 weeks) and follow-up period (30 days): planned total of 56 weeks. Since the study was prematurely terminated, the reporting period was shortened; AEs were assessed to the end of treatment, at a mean duration of 319 days (or 46 weeks).
Number of patients with treatment emergent adverse events
Results and safety
Loading the posted results from ClinicalTrials.gov…
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 24 Aug 2025.
- Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
161 sites in 14 countries: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 3 study testing Pimavanserin in people with Schizophrenia, run by ACADIA Pharmaceuticals Inc. at 161 sites in 14 countries.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 23 inclusion and 8 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: stopped early, as of the sponsor's last update on 24 Aug 2025. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 161 sites in United States, Russia, Bulgaria, Ukraine, Serbia and 9 more countries. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 3 studies compare the treatment with the current standard treatment or a placebo in a large group, to confirm how well it works and watch for side effects.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
Yes. Results are posted in the registry (first posted 24 Aug 2025). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Treatment Emergent Adverse Events (time frame: Treatment period (52 weeks) and follow-up period (30 days): planned total of 56 weeks. Since the study was prematurely terminated, the reporting period was shortened; AEs were assessed to the end of treatment, at a mean duration of 319 days (or 46 weeks).). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 24 Aug 2025.