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Study to Evaluate the Long-term Safety, Tolerability, and Durability of Treatment Effect of ALKS 3831

A Phase 3 Study to Assess the Long Term Safety, Tolerability, and Durability of Treatment Effect of ALKS 3831 in Subjects With Schizophrenia, Schizophreniform Disorder, or Bipolar I Disorder

Status
Completed
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT03201757
Enrollment
523
Registered
2017-06-28
Start date
2017-06-15
Completion date
2023-09-06
Last updated
2024-09-26

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Bipolar I Disorder, Schizophrenia, Schizophreniform Disorder

Keywords

Alkermes, ALKS 3831, Olanzapine, Samidorphan, Schizophrenia, Schizophreniform, Bipolar I

Brief summary

This study will evaluate the long-term safety, tolerability, and durability of treatment effect of ALKS 3831 in subjects with schizophrenia, schizophreniform disorder, or bipolar I disorder

Interventions

Olanzapine + samidorphan, daily oral dosing

Sponsors

Alkermes, Inc.
Lead SponsorINDUSTRY

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Intervention model description

Open-label

Eligibility

Sex/Gender
ALL
Age
16 Years to 70 Years
Healthy volunteers
No

Inclusion criteria

* Willing and able to give informed consent/assent as per local requirements * Agrees to use an acceptable method of contraception during the study, and for 30 days after any study drug administration, unless surgically sterile or post-menopausal * Has the potential to benefit from the administration of ALKS 3831, in the opinion of the investigator * Subject met the eligibility criteria of the antecedent study at the time of enrollment in the antecedent study and completed the treatment period in one of the following antecedent studies within 7 days: ALK3831-A304, ALK3831-A306, or ALK3831-A307 * Additional criteria may apply

Exclusion criteria

* Has any finding that, in the view of the investigator or medical monitor, would compromise the safety of the subject or affect their ability to fulfill the protocol visit schedule or visit requirements * Has a positive drug screen for drugs of abuse at study entry * Currently pregnant or breastfeeding or is planning to become pregnant during the study or within 30 days of the last study drug administration * Additional criteria may apply

Design outcomes

Primary

MeasureTime frameDescription
Incidence of Adverse EventsUp to 48 months
Change From Baseline in Clinical Global Impression-Severity (CGI-S) ScaleUp to 48 monthsThe clinical global impression - severity scale (CGI-S) is a 7-point scale that requires the clinician to rate the severity of the patient's illness at the time of assessment, relative to the clinician's past experience with patients who have the same diagnosis; 1 being normal, not ill at all and 7 being among the severally ill patients

Countries

Austria, Bulgaria, Ireland, Israel, Italy, Poland, Puerto Rico, Russia, Serbia, South Korea, Ukraine, United Kingdom, United States

Participant flow

Participants by arm

ArmCount
ALKS 3831
Coated bilayer tablet ALKS 3831: Olanzapine + samidorphan, daily oral dosing
523
Total523

Withdrawals & dropouts

PeriodReasonFG000
Overall StudyAdverse Event44
Overall StudyLack of Efficacy1
Overall StudyLogistical Difficulties Due to Regional Wars & COVID-1972
Overall StudyLost to Follow-up37
Overall StudyNot Yet Determined5
Overall StudyOther20
Overall StudyPregnancy2
Overall StudyProtocol Violation20
Overall StudyStudy Terminated at Site by Sponsor Due to Regional War1
Overall StudyWithdrawal by Subject133

Baseline characteristics

CharacteristicALKS 3831
Age, Continuous35.1 years
STANDARD_DEVIATION 12.16
Body Mass Index26.00 kg/m^2
STANDARD_DEVIATION 4.332
Clinical Global Impression-Severity3.06 units on a scale
STANDARD_DEVIATION 0.867
Ethnicity (NIH/OMB)
Hispanic or Latino
19 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
504 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants
Height172.28 Centimeters
STANDARD_DEVIATION 9.481
Race (NIH/OMB)
American Indian or Alaska Native
1 Participants
Race (NIH/OMB)
Asian
8 Participants
Race (NIH/OMB)
Black or African American
126 Participants
Race (NIH/OMB)
More than one race
7 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants
Race (NIH/OMB)
Unknown or Not Reported
1 Participants
Race (NIH/OMB)
White
380 Participants
Region of Enrollment
Austria
2 participants
Region of Enrollment
Bulgaria
63 participants
Region of Enrollment
Ireland
2 participants
Region of Enrollment
Israel
28 participants
Region of Enrollment
Italy
4 participants
Region of Enrollment
Poland
2 participants
Region of Enrollment
Russia
69 participants
Region of Enrollment
Serbia
25 participants
Region of Enrollment
South Korea
2 participants
Region of Enrollment
Ukraine
118 participants
Region of Enrollment
United Kingdom
2 participants
Region of Enrollment
United States
206 participants
Sex: Female, Male
Female
201 Participants
Sex: Female, Male
Male
322 Participants
Weight77.39 kilograms
STANDARD_DEVIATION 15.486

Adverse events

Event typeEG000
affected / at risk
deaths
Total, all-cause mortality
1 / 523
other
Total, other adverse events
314 / 523
serious
Total, serious adverse events
35 / 523

Outcome results

Primary

Change From Baseline in Clinical Global Impression-Severity (CGI-S) Scale

The clinical global impression - severity scale (CGI-S) is a 7-point scale that requires the clinician to rate the severity of the patient's illness at the time of assessment, relative to the clinician's past experience with patients who have the same diagnosis; 1 being normal, not ill at all and 7 being among the severally ill patients

Time frame: Up to 48 months

ArmMeasureValue (MEAN)Dispersion
ALKS 3831Change From Baseline in Clinical Global Impression-Severity (CGI-S) Scale-.24 units on a scaleStandard Deviation 0.651
Primary

Incidence of Adverse Events

Time frame: Up to 48 months

Population: All enrolled participants who received at least 1 dose of study drug

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
ALKS 3831Incidence of Adverse Events314 Participants

Source: ClinicalTrials.gov · Data processed: Feb 5, 2026