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Samatasvir

Phase 2

Chronic Hepatitis C Virus | Small molecule | Infectious Disease |Merck & Company, Inc.|Last Updated: Apr 23, 2015

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
RandomizedDouble-BlindCONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment143
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT01852604Samatasvir (IDX719) in Combinations With Simeprevir and/or TMC647055/Ritonavir With or Without Ribavirin for 12 Weeks in Participants With Chronic Hepatitis C Infection (MK-1894-005)PHASE2 COMPLETED 143Mar 1, 2013Apr 1, 2015Apr 23, 2015 -
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Study Endpoints
Primary Endpoints
Percentage of participants who experienced an adverse event (AE)
Up to approximately 95 weeks
Percentage of participants who experienced a serious adverse event (SAE)
Up to approximately 95 weeks
Percentage of participants who experienced a Grade 1-4 laboratory abnormality
Up to 66 weeks
Percentage of participants who experienced sustained virologic response 4 weeks after the end of treatment (SVR4)
Up to 16 weeks
Secondary Endpoints
Percentage of participants who experienced rapid virologic response (RVR)
Week 4
Percentage of participants who experienced early virologic response (EVR)
Week 12
Percentage of participants who experienced sustained virologic response 8 weeks after the end of treatment (SVR8)
Up to 20 weeks
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Study Design & Arms
AllocationRANDOMIZED
MaskingDOUBLE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Part A: GT 1b, 4 - samatasvir 50/simeprevir/RBVEXPERIMENTALPart A: Participants with genotype 1b or 4 received samatasvir 50 mg and samatasvir matching placebo once daily, plus simeprevir 150 mg capsule once daily, plus RBV (dosing weight-based, according to product label) twice daily for 12 weeks
Part A: GT 1b, 4 - samatasvir 100/simeprevir/RBVEXPERIMENTALPart A: Participants with genotype 1b or 4 received samatasvir 100 mg and samatasvir matching placebo once daily, plus simeprevir 150 mg capsule once daily, plus RBV (dosing weight-based, according to product label) twice daily for 12 weeks
Part A: GT 1b, 4 - samatasvir 150/simeprevir/RBVEXPERIMENTALPart A: Participants with genotype 1b or 4 received samatasvir 150 mg once daily, plus simeprevir 150 mg capsule once daily, plus RBV (dosing weight-based, according to product label) twice daily for 12 weeks
Part B: GT 1b, 4 - samatasvir 25/simeprevir/RBVEXPERIMENTALPart B: Participants with genotype 1b or 4 received samatasvir 25 mg once daily, plus simeprevir 150 mg capsule once daily, plus RBV (dosing weight-based, according to product label) twice daily for 12 weeks
Part B: GT 1b, 4 - samatasvir 100/simeprevir/RBVEXPERIMENTALPart B: Participants with genotype 1b or 4 received samatasvir 100 mg once daily, plus simeprevir 150 mg capsule once daily, plus RBV (dosing weight-based, according to product label) twice daily for 12 weeks
Part B: GT 6 - samatasvir 100/simeprevir/RBVEXPERIMENTALPart B: Participants with Genotype 6 received samatasvir 100 mg once daily, plus simeprevir 150 mg capsule once daily, plus RBV (dosing weight-based, according to product label) twice daily for 12 weeks
Part C: GT 1a, 1b - samatasvir 50/simeprevir/TCM647055/RTVEXPERIMENTALPart C: Participants with Genotype 1a or 1b received samatasvir 50 mg once daily, plus simeprevir 75 mg capsule once daily, plus TMC647055 450 mg once daily plus RTV 30 mg once daily for 12 weeks
Part C: GT 1a, 1b - samatasvir 50/simeprivir/TCM647055/RTV/RBVEXPERIMENTALPart C: Participants with Genotype 1a or 1b received samatasvir 50 mg once daily, plus simeprevir 75 mg capsule once daily, plus TMC647055 450 mg once daily, plus RTV 30 mg once daily, plus RBV (dosing weight-based, according to product label) twice daily for 12 weeks
Interventions
NameTypeDescription
SamatasvirDRUGSamatasvir (IDX719) will be supplied as 25 mg and 50 mg oral tablets.
SimeprevirDRUGSimeprevir will be supplied as 75 and 150 mg oral capsules.
Ribavirin (RBV)DRUGRibavirin will be supplied as 200 mg oral tablets. Participants in the RBV-free arms experiencing non-response or virologic breakthrough during the treatment period will be offered RBV dosed according to the product label as an add-on to the participant's randomized treatment assignment.
TMC647055DRUGTMC647055 will be supplied as 150 mg oral capsules.
Ritonavir (RTV)DRUGRitonavir will be supplied as 80 mg/mL oral solution.
Pegylated interferon (Peg-IFN)BIOLOGICALParticipants experiencing non-response or virologic breakthrough during the treatment period will be offered Peg-IFN (subcutaneous injection) dosed according to the product label as an add-on to the participant's randomized treatment assignment.
Samatasvir matching placeboOTHERSamatasvir matching placebo will be supplied for the 50 mg tablets used in Part A.
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Eligibility Criteria
Age Range18 Years — 65 Years
SexALL
Healthy VolunteersNo

Inclusion Criteria: * Must have Genotype 1a, 1b, 4 or 6 HCV infection. * Documented clinical history compatible with chronic hepatitis C * HCV treatment-naïve or interferon/RBV-treatment relapsed (Part C) * Must agree to use an acceptable double method of birth control (one of which must be a barri...

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