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PCS6422 and capecitabine

Phase 2

Breast Cancer | Small molecule | Oncology |Processa Pharmaceuticals, Inc.|Last Updated: Jun 19, 2025

Success Probability

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Market & Valuation

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Trial Design

RandomizedACTIVE_CONTROLLED
Total Trials1
Total Enrollment90

FDA Designations

No designations recorded

Clinical trial landscape

PCS6422 and capecitabine · 2 trials · 6 indications

Phase 2 1Phase 1 1
NCT06568692A Phase 2 Study of PCS6422 With Capecitabine in Patients With Advanced or Metastatic Breast CancerBreast Cancer
RECRUITING90 Analytics
PHASE2RECRUITING
A Phase 2 Study of PCS6422 With Capecitabine in Patients With Advanced or Metastatic Breast Cancer
Breast CancerUnlock trial analytics

Study Endpoints

Primary Endpoints

Evaluation of Objective Response Rate (ORR)
Up to 24 weeks post End of Treatment (EoT)

The proportion of patients who achieved a confirmed complete response (CR) or partial response (PR) according to Response Evaluation Criteria in Solid Tumors version 1.1 (RECIST 1.1)

Number of patients with adverse events (AEs)
During treatment, an average of 8 months

Frequency, duration, and severity of AEs across treatment groups

Number of participants with dose limiting toxicities (DLT) and incidence of adverse events as assessed by CTCAE v5.0
~6 months

Frequency, duration, and severity of DLTs and adverse events (AEs)

Maximum Plasma Concentration (Cmax) of capecitabine
~14 days

To evaluate the Maximum Plasma Concentration (Cmax) of capecitabine

Secondary Endpoints

Evaluation of Disease Control Rate (DCR)
Up to 24 weeks post End of Treatment (EoT)
Evaluation of Duration of Response (DOR)
Up to 24 weeks post End of Treatment (EoT)
Evaluation of Time to Response (TTR)
Every 12 weeks during treatment
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Study Design & Arms

AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
PCS6422 40 mg + Capecitabine 300 mgEXPERIMENTALFixed single dose of PCS6422 administered with Capecitabine 150 mg BID over 7 days
PCS6422 40 mg + Capecitabine 450 mg or 150 mgEXPERIMENTALFixed single dose of PCS6422 administered with Capecitabine 225 mg or 75 mg BID over 7 days
Capecitabine 2000 mg/m2ACTIVE_COMPARATORStandard capecitabine dose at 1000 mg/m2 BID
PCS6422 + CapecitabineEXPERIMENTALFixed dose of PCS6422 combined with various doses of Capecitabine administered in 14 day cycles

Interventions

NameTypeDescription
PCS6422 and capecitabineDRUGPCS6422 is an experimental drug that, when combined with capecitabine, may make the immune response more active against cancer.
CapecitabineDRUGCommercially available capecitabine is a commonly used oral fluoropyrimidine.
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites13

Inclusion Criteria: 1. Aged ≥18 years at Screening 2. Diagnosis of histologically confirmed breast cancer that is unresectable. The following subsets of breast cancer are included: 1. Patients with triple-negative breast cancer, advanced or metastatic 2. Patients with hormone receptor (HR) p...

Countries:United States
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Competitive Landscape -Breast Cancer 399 trials

Top 20 of 91 competitors

CompanyTickerTrialsLead PhaseDrugs
AstraZeneca PLCAZN46PHASE3Fulvestrant, Capivasertib
Merck & Co., Inc.MRK12PHASE3Pembrolizumab, Paclitaxel, Doxorubicin, Epirubicin, Cyclophosphamide
Eli Lilly and CompanyLLY27PHASE3Abemaciclib, Standard Adjuvant Endocrine Therapy
BioNTech SE Sponsored ADRBNTX7PHASE3DB-1303/BNT323, T-DM1
Gilead Sciences, Inc.GILD13PHASE3Sacituzumab Govitecan-hziy, Eribulin, Capecitabine Product, Gemcitabine, Vinorelbine
Novartis AG Sponsored ADRNVS30PHASE3Ribociclib
Pfizer Inc.PFE34PHASE3ARV-471, Fulvestrant
BeOne Medicines Ltd. Sponsored ADRONC5PHASE3BGB-43395, Letrozole, Abemaciclib, Palbociclib, Ribociclib
Olema Pharmaceuticals, Inc.OLMA5PHASE3Palazestrant, Fulvestrant, Anastrozole, Letrozole, Exemestane
Jazz Pharmaceuticals Public Limited CompanyJAZZ3PHASE3Zanidatamab, Trastuzumab, Eribulin, Vinorelbine, Gemcitabine
Celcuity Inc.CELC3PHASE3Gedatolisib, Palbociclib, Fulvestrant, Alpelisib
Relay Therapeutics, Inc.RLAY2PHASE3Zovegalisib, Capivasertib, Fulvestrant
GSK plc Sponsored ADRGSK2PHASE3Niraparib
Greenwich LifeSciences, Inc.GLSI1PHASE3GLSI-100
Bristol-Myers Squibb CompanyBMY5PHASE2Iza-bren, Nab-paclitaxel, Paclitaxel, Capecitabine, Carboplatin
BriaCell Therapeutics CorpBCTX1PHASE3SV-BR-1-GM, Cyclophosphamide, Interferon infiltration of the inoculation site, Retifanlimab, Treatment of Physician's Choice
Incyte CorporationINCY4PHASE2Ruxolitinib, Capecitabine, Regorafenib
Natera, Inc.NTRA3PHASE2Discontinuation of the anti-HER2 maintenance therapy
Puma Biotechnology, Inc.PBYI3PHASE2Neratinib, Loperamide, Colesevelam
Atossa Therapeutics, Inc.ATOS1PHASE2endoxifen, goserelin
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Frequently asked questions about PCS6422 and capecitabine

What is PCS6422 and capecitabine used for?

PCS6422 and capecitabine is an investigational combination being studied for the treatment of advanced cancer and breast cancer. In clinical trials, it is being evaluated in patients with advanced, refractory gastrointestinal tract tumors and in patients with advanced or metastatic breast cancer, including triple-negative breast cancer and HER2-negative breast cancer.

Who makes PCS6422 and capecitabine?

PCS6422 and capecitabine is being developed by Processa Pharmaceuticals, Inc., a biopharmaceutical company traded on the Nasdaq under the ticker symbol PCSA. The company is conducting clinical trials of this combination in the United States.

What phase is PCS6422 and capecitabine in?

PCS6422 and capecitabine is in clinical development. A Phase 1 study of the combination in patients with advanced, refractory gastrointestinal tract tumors has been completed, and a Phase 2 study in patients with advanced or metastatic breast cancer is currently recruiting participants. The drug is investigational and not yet approved.

What clinical trials is PCS6422 and capecitabine in?

PCS6422 and capecitabine has been studied in two clinical trials. NCT04861987 was a completed Phase 1 study in patients with advanced, refractory GI tract tumors, enrolling 23 participants. NCT06568692 is a recruiting Phase 2 study in patients with advanced or metastatic breast cancer, with a planned enrollment of 90 participants.

Is PCS6422 and capecitabine the same as eniluracil with capecitabine?

Yes, PCS6422 is also known as eniluracil. The Phase 1 clinical trial NCT04861987 is titled 'A Study of the Safety and PK of PCS6422 (Eniluracil) with Capecitabine in Patients with Advanced, Refractory GI Tract Tumors,' confirming that PCS6422 and eniluracil refer to the same compound.