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Cysteamine Bitartrate

Phase 3

Cystinosis | Small molecule | Other |Amgen Inc.|Last Updated: Dec 27, 2024

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
UNCONTROLLEDBiomarker
Total Trials1
Total Enrollment60
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT01197378Long-Term Safety Follow-up Study of Cysteamine Bitartrate Delayed-release Capsules (RP103)PHASE3 COMPLETED 60Aug 27, 2010Jun 26, 2017Dec 27, 202410 United States, France +1
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Study Endpoints
Primary Endpoints
Number of Participants With Treatment-emergent Adverse Events
From first dose of study drug to 7 days after the last dose; median duration of treatment was 1461 days.

Drug-related adverse events (AEs) are AEs the investigator assessed as having relation to drug of 'possibly', 'probably' or 'definitely'. The severity of AEs was categorized according to the Common Terminology Criteria for Adverse Events (CTCAE), Version 3.0 as follows: * Mild (Grade 1): experience is minor and does not cause significant discomfort to subject or change in activities of daily living (ADL); subject is aware of symptoms but symptoms are easily tolerated; * Moderate (Grade 2): experience is an inconvenience or concern to the subject and causes interference with ADL, but the subject is able to continue with ADL. * Severe (Grade 3): experience significantly interferes with ADL and the subject is incapacitated and/or unable to continue with ADL * Life-threatening (Grade 4): experience that, in the view of the Investigator, places the subject at immediate risk of death from the event as it occurred.

Secondary Endpoints
Trough Plasma Cysteamine Concentration
Day 1 (predose) and Month 6, Years 1, 1.5, 2, 3, 4 and 5 at 0.5 hours post-dose
White Blood Cell Cystine Concentration
Day 1 (predose) and Month 6, Years 1, 1.5, 2, 3, 4 and 5 at 0.5 hours post-dose
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Study Design & Arms
AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Cysteamine BitartrateEXPERIMENTALCysteamine bitartrate delayed-release capsules were administered twice daily for up to 96 months.
Interventions
NameTypeDescription
Cysteamine Bitartrate Delayed-release CapsulesDRUGParticipants who entered the trial from the RP103-03 study continued treatment with cysteamine bitartrate every 12 hours at the last dose level prescribed during their participation in that study. Participants not entering the trial from Study RP103-03 were started on twice a day administration of cysteamine bitartrate at a total daily RP103 dose of 70% of their pre-study total daily stable Cystagon® dose.
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Eligibility Criteria
Age Range1 Year — N/A
SexALL
Healthy VolunteersNo
Study Sites10

Inclusion Criteria: * Male and female subjects must have completed the last visit of Study RP103-03 and be willing to continue with RP103 treatment. OR for patients who did not complete the RP103-03 study: * Male and female subjects must have cystinosis. * Subjects must be on a stable dose of Cys...

Countries:United StatesFranceNetherlands
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