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JZP815

Phase 1

Advanced Cancer | Small molecule | Oncology |Jazz Pharmaceuticals plc|Last Updated: Apr 23, 2026

Target and mechanism

Molecular targetRAF
Target classKinase
ModalitySmall molecule

Success Probability

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Market & Valuation

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Trial Design

CONTROLLEDDMC
Total Trials1
Total Enrollment332

FDA Designations

No designations recorded

Clinical trial landscape

JZP815 · 1 trial · 3 indications

Phase 1 1
NCT05557045A Study of JZP815 Oral Capsules in Adult Participants With Advanced or Metastatic Solid Tumors Harboring Mitogen Activated Protein Kinase (MAPK) Pathway Alterations to Investigate the Safety, Dosing, and Antitumor Activity of JZP815Advanced Cancer
RECRUITING332 Analytics
PHASE1RECRUITING
A Study of JZP815 Oral Capsules in Adult Participants With Advanced or Metastatic Solid Tumors Harboring Mitogen Activated Protein Kinase (MAPK) Pathway Alterations to Investigate the Safety, Dosing, and Antitumor Activity of JZP815
Advanced CancerUnlock trial analytics

Study Endpoints

Primary Endpoints

Number of Participants With Dose-Limiting Toxicities (Part A)
Baseline until death, withdrawal of consent, or lost to follow-up, up to 18 months after last participant starts study intervention
Number of Participants With Treatment-emergent Adverse Events and Serious Adverse Events (Part A and B)
Baseline until death, withdrawal of consent, or lost to follow-up, up to 18 months after last participant starts study intervention
Change From Baseline in Hemoglobin (Part A and B)
Baseline until death, withdrawal of consent, or lost to follow-up, up to 18 months after last participant starts study intervention
Change From Baseline in Absolute Neutrophil Count (Part A and B)
Baseline until death, withdrawal of consent, or lost to follow-up, up to 18 months after last participant starts study intervention
Change From Baseline in Platelets (Part A and B)
Baseline until death, withdrawal of consent, or lost to follow-up, up to 18 months after last participant starts study intervention
Change From Baseline in Hematocrit (Part A and B)
Baseline until death, withdrawal of consent, or lost to follow-up, up to 18 months after last participant starts study intervention
Change From Baseline in Aspartate Aminotransferase (Part A and B)
Baseline until death, withdrawal of consent, or lost to follow-up, up to 18 months after last participant starts study intervention
Change From Baseline in Alanine Aminotransferase (Part A and B)
Baseline until death, withdrawal of consent, or lost to follow-up, up to 18 months after last participant starts study intervention
Change From Baseline in Creatinine (Part A and B)
Baseline until death, withdrawal of consent, or lost to follow-up, up to 18 months after last participant starts study intervention
Change From Baseline in Total Bilirubin (Part A and B)
Baseline until death, withdrawal of consent, or lost to follow-up, up to 18 months after last participant starts study intervention
Change From Baseline in Heart Rate (Part A and B)
Baseline until death, withdrawal of consent, or lost to follow-up, up to 18 months after last participant starts study intervention
Change From Baseline in Blood Pressure (Part A and B)
Baseline until death, withdrawal of consent, or lost to follow-up, up to 18 months after last participant starts study intervention
Number of Participants With Dose Interruptions and Reductions (Part A and B)
Baseline until death, withdrawal of consent, or lost to follow-up, up to 18 months after last participant starts study intervention
Objective Response Rate (as Defined by RECIST v1.1) (Part B)
Baseline until death, withdrawal of consent, or lost to follow-up, up to 18 months after last participant starts study intervention
Duration of Response (Part B)
Baseline until death, withdrawal of consent, or lost to follow-up, up to 18 months after last participant starts study intervention

Secondary Endpoints

Pharmacokinetic Parameter Maximum Plasma Concentration (Cmax) Levels of JZP815 and its Metabolites (Part A)
MTD determination cohorts, Cycle 1 Days 1 and 15: predose and 0.25,0.5,1,2,3,4,6, 8 hours (hr) postdose; 24, 48 and 72 hr postdose relative to 1st dose given on Cycle 1 Day 1; Others, Cycle 1 Days 1, 15 or 22: predose and 0.25,0.5,1,2,3,4,6,8 hr postdose
Pharmacokinetic Parameter Time to Maximum Plasma Concentration (Tmax) of JZP815 and its Metabolites (Part A)
MTD determination cohorts, Cycle 1 Days 1 and 15: predose and 0.25,0.5,1,2,3,4,6, 8 hours (hr) postdose; 24, 48 and 72 hr postdose relative to 1st dose given on Cycle 1 Day 1; Others, Cycle 1 Days 1, 15 or 22: predose and 0.25,0.5,1,2,3,4,6,8 hr postdose
Pharmacokinetic Parameter Area Under the Concentration-Time Curve (AUC) of JZP815 and its Metabolites (Part A)
MTD determination cohorts, Cycle 1 Days 1 and 15: predose and 0.25,0.5,1,2,3,4,6, 8 hours (hr) postdose; 24, 48 and 72 hr postdose relative to 1st dose given on Cycle 1 Day 1; Others, Cycle 1 Days 1, 15 or 22: predose and 0.25,0.5,1,2,3,4,6,8 hr postdose
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Dose Exploration (Part A): JZP815EXPERIMENTALParticipants will receive JZP815 with a starting dose of 20 mg twice daily (BID).
Expansion (Part B): JZP815EXPERIMENTALParticipants with advanced or metastatic solid tumors who will receive JZP815 at the RP2D established in Dose Exploration (Part A).

Interventions

NameTypeDescription
JZP815DRUGJZP815 will be administered as oral capsules to participants BID approximately 12 hours apart, in the morning and in the evening. QD dosing may also be investigated, if supported by PK data.
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites15

Inclusion Criteria: * Participant must be ≥ 18 years of age, at the time of signing the informed consent * Participants who have histological or cytological diagnosis of an advanced or metastatic solid tumor carrying a documented, clinically significant, MAPK pathway alteration * Participants must ...

Countries:United States
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Competitive Landscape -Cancer 5 trials (matched to "Advanced Cancer")

Frequently asked questions about JZP815

What is JZP815 used for?

JZP815 is an investigational small molecule being developed for the treatment of advanced cancer, including advanced or metastatic solid tumors. It is currently being studied in adult participants with solid tumors that harbor mitogen activated protein kinase (MAPK) pathway alterations, with the goal of investigating its safety, dosing, and antitumor activity.

What does JZP815 target?

JZP815 targets RAF, a kinase in the MAPK signaling pathway. By inhibiting RAF, the drug aims to interfere with cancer cell growth and survival in tumors that have alterations in the MAPK pathway. This mechanism is being evaluated in a Phase 1 clinical trial for advanced solid tumors.

Who makes JZP815?

JZP815 is being developed by Jazz Pharmaceuticals plc, a biopharmaceutical company traded on the NASDAQ under the ticker symbol JAZZ. The company is conducting clinical research on this investigational oncology drug candidate.

What phase is JZP815 in?

JZP815 is in Phase 1 clinical development. It is an investigational drug, meaning it has not been approved by regulatory authorities and is still being studied in clinical trials. The ongoing Phase 1 trial is recruiting participants to evaluate the drug's safety, dosing, and antitumor activity.

What clinical trials is JZP815 in?

JZP815 is being studied in a Phase 1 clinical trial registered as NCT05557045. This open-label, controlled study is recruiting approximately 332 adult participants in the United States with advanced or metastatic solid tumors harboring MAPK pathway alterations. The trial is currently active and recruiting participants.

Is JZP815 the same as any other drug?

JZP815 is the investigational name for this drug candidate developed by Jazz Pharmaceuticals. No alternative names have been reported for JZP815 in the clinical trial information. It is a distinct small molecule being studied for its potential role in treating advanced solid tumors with MAPK pathway alterations.