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OLZ/SAM

Phase 3

Bipolar I Disorder | Small molecule | Psychiatry |Alkermes plc|Last Updated: Aug 14, 2026

Success Probability

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Market & Valuation

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Trial Design

CONTROLLED
Total Trials2
Total Enrollment243

FDA Designations

No designations recorded

Clinical trial landscape

OLZ/SAM · 3 trials · 2 indications

Phase 3 2Phase 1 1
NCT05303064Study to Evaluate Weight Gain as Assessed by Change in BMI Z-score in Pediatric Subjects With Schizophrenia or Bipolar I DisorderSchizophrenia
RECRUITING220 Analytics
NCT04987229Long-term Safety Extension Study of OLZ/SAM in Pediatric SubjectsBipolar I Disorder
ENROLLING BY_INVITATION236 Analytics
PHASE3RECRUITING
Study to Evaluate Weight Gain as Assessed by Change in BMI Z-score in Pediatric Subjects With Schizophrenia or Bipolar I Disorder
SchizophreniaUnlock trial analytics
PHASE3ENROLLING BY_INVITATION
Long-term Safety Extension Study of OLZ/SAM in Pediatric Subjects
Bipolar I DisorderUnlock trial analytics

Study Endpoints

Primary Endpoints

Change from baseline in body mass index (BMI) Zscore at week 12
12 weeks

To compare changes in body mass index (BMI) Z-score following treatment with OLZ/SAM vs olanzapine

Incidence of adverse events
Up to 52 weeks
Maximum plasma concentration observed
Up to 3 weeks
Area under the plasma concentration-time curve over the 24-hour dosing interval
Up to 3 weeks
Time to reach maximum concentration
Up to 3 weeks

Secondary Endpoints

Proportion of subjects with >=0.5 increase in BMI Z-score at Week 12
12 weeks
Time to all-cause discontinuation of study drug over 52 weeks
Up to 52 weeks
Change from baseline in waist circumference
12 weeks
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Group 1 OLZ/SAMEXPERIMENTALFixed dose combination of olanzapine and samidorphan
Group 2 OlanzapineACTIVE_COMPARATORFixed dose of olanzapine
All subjectsEXPERIMENTALAll subjects will receive OLZ/SAM at a dose determined by the Investigator and based on the olanzapine dosing received in the antecedent study (ALKS 3831-A311 or ALKS 3831-A312 ENLIGHTEN-Youth)
Group 1 Olanzapine/ 5 mg SamidorphanEXPERIMENTALOlanzapine will be gradually increased to a target dose of 10mg/samidorphan 5mg (Range: 5-20mg Olanzapine/samidorphan 5mg)
Group 2 Olanzapine/ 10mg SamidorphanEXPERIMENTALOlanzapine will be gradually increased to a target dose of 10mg/samidorphan 10mg (Range: 5-20mg Olanzapine/samidorphan 10mg)

Interventions

NameTypeDescription
OLZ/SAMDRUGOLZ/SAM refers to the fixed dose combination of olanzapine and samidorphan. The starting dose of olanzapine will be 2.5 mg/day or 5 mg/day at the discretion of the Investigator with a maximum daily dose of 20mg/day. The starting dose of samidorphan will be 5 or 10 mg.
OlanzapineDRUGThe starting dose of olanzapine will be 2.5 mg/day or 5 mg/day at the discretion of the Investigator with a maximum daily dose of 20mg/day
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Eligibility Criteria

Age Range10 Years to 17 Years
SexALL
Healthy VolunteersNo
Study Sites47

Inclusion Criteria: * Subjects aged 13 to 17 years with schizophrenia or aged 10 to 17 years with bipolar I disorder, diagnosed according to Diagnostic and Statistical Manual of Mental Disorders, 5th Edition (DSM-5) criteria * Subject is an outpatient or will be able to be treated on an outpatient ...

Countries:United StatesArgentinaBrazilColombiaMexico
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Recent Changes (Last 90 Days)

LOWAug 14, 2026NCT05303064lastUpdatePostDate: changed
LOWAug 14, 2026NCT04987229lastUpdatePostDate: changed
LOWAug 14, 2026NCT05303064lastUpdatePostDate: changed
LOWAug 14, 2026NCT04987229lastUpdatePostDate: changed

Frequently asked questions about OLZ/SAM

What is OLZ/SAM used for?

OLZ/SAM is an investigational small molecule being developed for Bipolar I Disorder and Schizophrenia. It is currently in Phase 3 clinical development and is not yet approved by the FDA. The drug is being studied in pediatric subjects aged 10 years and older.

Who makes OLZ/SAM?

OLZ/SAM is being developed by Alkermes plc, a biopharmaceutical company traded on the NASDAQ under the ticker symbol ALKS. The company is conducting clinical trials to evaluate the drug's safety and efficacy in pediatric patients with Bipolar I Disorder and Schizophrenia.

What phase is OLZ/SAM in?

OLZ/SAM is in Phase 3 clinical development. It is an investigational drug, meaning it has not been approved by the FDA. The Phase 3 program includes a long-term safety extension study and a study evaluating weight gain in pediatric subjects with Schizophrenia or Bipolar I Disorder.

What clinical trials is OLZ/SAM in?

OLZ/SAM is being studied in several clinical trials. NCT04987229 is a Phase 3 long-term safety extension study in pediatric subjects. NCT04987658 is a completed Phase 1 study in pediatric subjects with Bipolar I Disorder. NCT05303064 is a Phase 3 study evaluating weight gain in pediatric subjects with Schizophrenia or Bipolar I Disorder.

Is OLZ/SAM being studied in pediatric patients?

Yes, OLZ/SAM is being studied in pediatric patients aged 10 years and older. Clinical trials include a Phase 3 long-term safety extension study, a completed Phase 1 study, and a Phase 3 study evaluating weight gain, all focusing on pediatric subjects with Bipolar I Disorder or Schizophrenia.