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Adefovir Dipivoxil for , /mL

Phase 3

Chronic Hepatitis B | Small molecule | Infectious Disease |Gilead Sciences, Inc.|Last Updated: Oct 16, 2013

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-BlindPLACEBO_CONTROLLEDBiomarker
Total Trials2
Total Enrollment221
FDA Designations
No designations recorded
Clinical Trials (2)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT00095121Safety and Efficacy of Adefovir Dipivoxil in Children and Adolescents With Chronic Hepatitis BPHASE3 COMPLETED 173Jun 1, 2004Apr 1, 2010May 22, 20121 United States
NCT00071201Evaluate Efficacy, Safety and PK of Adefovir Dipivoxil Liquid Suspension in Patients With Chronic Hepatitis BPHASE3 COMPLETED 48Jun 1, 2003Mar 1, 2006Oct 16, 20131 United States
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Study Endpoints
Primary Endpoints
Percentage of Participants With Serum Hepatitis B Virus (HBV) Deoxyribonucleic Acid (DNA) < 1000 Copies/mL (Polymerase Chain Reaction [PCR]-Based Assay) and Normal Alanine Aminotransferase (ALT) at Week 48 (Missing = Failure)
Week 48

In the absence of biopsy data from these pediatric participants, this endpoint enables assessments of drug effect on viral replication and the underlying degree of inflammation in the liver.

Secondary Endpoints
Percentage of Participants With Serum HBV DNA < 1000 Copies/mL (PCR-based Assay) While on Treatment (Missing = Failure) (ADV Baseline)
ADV baseline
Percentage of Participants With Serum HBV DNA < 1000 Copies/mL (PCR-based Assay) While on Treatment - Missing = Failure) (ADV Week 192)
ADV Week 192
Percentage of Participants With Serum HBV DNA < 1000 Copies/mL (PCR-based Assay) While on Treatment (Missing = Failure) (ADV Week 240)
ADV Week 240
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Study Design & Arms
AllocationRANDOMIZED
MaskingTRIPLE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Placebo (PLB)PLACEBO_COMPARATORParticipants randomized to receive placebo received placebo during the first 48 weeks of treatment (double-blind phase) and then all eligible participants were administered open-label ADV for the remainder of the study.
Adefovir Dipivoxil (ADV)EXPERIMENTALParticipants randomized to receive ADV received ADV during the first 48 weeks of treatment (double-blind phase) and then all eligible participants were administered open-label ADV for the remainder of the study.
Interventions
NameTypeDescription
Placebo (PLB)DRUGMatching placebo
Adefovir Dipivoxil (ADV)DRUG10-mg tablet or 2-mg/mL oral suspension
LamivudineDRUG100-mg tablet administered according to package labeling. Lamivudine was to be added to the open-label ADV regimen of subjects with a serum HBV DNA concentration \>= 1000 copies/mL at 2 consecutive study visits at or after Study Week 96. If the HBV DNA concentration remained \>= 1000 copies/mL at 2 consecutive study visits after the addition of lamivudine, the investigator was required to discontinue all study drugs, perform the early termination ssessments, and have the subject return every 4 weeks for 16 weeks of posttreatment evaluations.
Adefovir Dipivoxil for oral suspension, 2 mg/mLDRUG -
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Eligibility Criteria
Age Range2 Years — 17 Years
SexALL
Healthy VolunteersNo
Study Sites1

Key Inclusion Criteria: * Positive HBsAg \>= 6 months prior to randomization and positive HBeAg at screening. * Serum HBV DNA greater than or equal to 1 x 100,000 copies/mL (PCR assay) at initial or confirmatory screening visit. * Serum ALT levels greater than or equal to 1.5 x ULN at both initial ...

Countries:United States
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