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HCQ

Phase 4

Breast Cancer | Small molecule | Oncology |Pfizer, Inc.|Trials Updated: Oct 16, 2026

HCQ development status

Highest phase Phase 4 (NCT00848354)
Phase scored for PFEPhase 2
Registered trials 5 across 5 sponsors since Feb 2009

HCQ target and mechanism

ModalitySmall molecule

Also known as Hydroxychloroquine sulfate, Plaquenil

Success Probability

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Market & Valuation

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Trial Design

RandomizedCONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment96

FDA Designations

No designations recorded

HCQ clinical trials

HCQ · 1 trial · 1 indication

Phase 2 1
NCT04841148Avelumab or Hydroxychloroquine With or Without Palbociclib to Eliminate Dormant Breast CancerBreast Cancer
ACTIVE NOT_RECRUITING96 Analytics
PHASE2ACTIVE NOT_RECRUITING
Avelumab or Hydroxychloroquine With or Without Palbociclib to Eliminate Dormant Breast Cancer
Breast CancerUnlock trial analytics

Study Endpoints

Primary Endpoints

Determine the efficacy of HCQ or Avelumab, alone or in combination with Palbociclib, in eradicating DTCs
Efficacy is assessed at the end of Cycle 6 (each cycle is 28 days).

Endpoint: Proportion of subjects in each treatment arm with clearance of DTCs at the end of 6 cycles of therapy.

Secondary Endpoints

Determine the safety and tolerability of HCQ or Avelumab, alone or in combination with Palbociclib, in this Phase II study: adverse events
Toxicity is assessed from the first dose of study treatment through 30 days after the last dose of study treatment
Estimate the risk of recurrence after treatment with Palbociclib, Avelumab and HCQ, alone or in combination
Recurrence free survival (RFS) will be assessed 3 years after the completion of study treatment
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Study Design & Arms

AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
HCQEXPERIMENTALPatients will receive HCQ, 600 mg twice daily D1-28 of each 28-day cycle.
AvelumabEXPERIMENTALPatients will receive Avelumab, 10 mg/kg, IV, D1 and D15 of each 28-day cycle.
Palbociclib and AvelumabEXPERIMENTALPatients will receive Palbociclib 125 mg daily, by mouth on D1-21 concurrently with Avelumab, 10 mg/kg IV on D1 and D15 of each 28-day cycle
Palbociclib and HCQEXPERIMENTALPatients will receive Palbociclib 75 mg daily, by mouth on D1-28 concurrently with HCQ, 600 mg twice daily D1-28 of each 28-day cycle.

Interventions

NameTypeDescription
HCQDRUG600 mg tablets twice daily D1-28 of each 28-day cycle
AvelumabDRUG10 mg/kg, IV, D1 and D15 of each 28-day cycle
PalbociclibDRUG125 mg capsule daily, by mouth on D1-21 concurrently with Avelumab. Or 75 mg capsule daily, by mouth on D1-28 concurrently with HCQ.
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites7

Inclusion Criteria: * Bone marrow aspirate after completion of all definitive therapy demonstrates detectable DTCs (via IHC) as performed by central laboratory assessment at University of Pennsylvania. * History of stage II-III histologically-confirmed ER+/Her2 neg invasive breast cancer with no ev...

Countries:United States
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Competitive Landscape -Breast Cancer 609 trials