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Zidesamtinib

Phase 1

Locally Advanced Solid Tumor | Small molecule | Oncology |Nuvalent, Inc.|Last Updated: Oct 24, 2025

Target and mechanism

Target class-Tinib (Kinase)
ModalitySmall molecule

Also known as Zidesamtinib (NVL-520)

Success Probability

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Market & Valuation

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Trial Design

CONTROLLEDDMC
Total Trials1
Total Enrollment359

FDA Designations

BREAKTHROUGH_THERAPYORPHAN_DRUG

Clinical trial landscape

Zidesamtinib · 1 trial · 2 indications

Phase 1 1
NCT05118789A Study of Zidesamtinib (NVL-520) in Patients With Advanced NSCLC and Other Solid Tumors Harboring ROS1 Rearrangement (ARROS-1)Locally Advanced Solid Tumor
RECRUITING359 Analytics
PHASE1RECRUITING
A Study of Zidesamtinib (NVL-520) in Patients With Advanced NSCLC and Other Solid Tumors Harboring ROS1 Rearrangement (ARROS-1)
Locally Advanced Solid TumorUnlock trial analytics

Study Endpoints

Primary Endpoints

Maximum Tolerated Dose (MTD) (Phase 1)
Within 28 days of last patient dosed during dose escalation

Highest dose with dose-limiting toxicity (DLT) rate ≤ 25%

Recommended Phase 2 Dose (RP2D)
Within 28 days of last patient dosed during dose escalation.

To determine the RP2D

Objective Response Rate (ORR) (Phase 2)
2-3 years after first patient dosed.

To determine ORR as assessed by BICR

Secondary Endpoints

Number of participants with treatment-emergent adverse events, as assessed by CTCAE, v5.0
Approximately 3 years.
Maximum plasma concentration (Cmax) of NVL-520
Pre-dose and up to 24 hours post-dose
Plasma concentration at the end of the dosing interval (Ctau) of NVL-520
Pre-dose and up to 24 hours post-dose
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Phase 1 dose escalationEXPERIMENTALZidesamtinib (NVL-520) oral daily dosing
Cohort 2aEXPERIMENTALROS1+ NSCLC naïve to TKI therapy and up to 1 prior chemotherapy and/or immunotherapy
Cohort 2bEXPERIMENTALROS1+ NSCLC treated with 1 prior ROS1 TKI and no prior chemotherapy or immunotherapy
Cohort 2cEXPERIMENTALROS1+ NSCLC treated with 1 prior ROS1 TKI and 1 prior platinum-based chemotherapy with or without immunotherapy
Cohort 2dEXPERIMENTALROS1+ NSCLC treated with ≥2 prior ROS1 TKIs and up to 1 prior chemotherapy and/or immunotherapy
Cohort 2eEXPERIMENTALROS1+ solid tumor and progressed on any prior therapy

Interventions

NameTypeDescription
Zidesamtinib (NVL-520)DRUGOral tablet of zidesamtinib (NVL-520)
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Eligibility Criteria

Age Range12 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites63

Inclusion Criteria: 1. Age ≥18 years (Cohort 2e only: Age ≥12 years). 2. Disease Criteria: 1. Phase 1: Histologically or cytologically confirmed locally advanced or metastatic solid tumor with documented ROS1 rearrangement. 2. Phase 2: Cohorts 2a, 2b, 2c and 2d: Histologically or cytological...

Countries:United StatesAustraliaBelgiumCanadaFranceGermanyItalyJapanNetherlandsSingaporeSouth KoreaSpainTaiwanUnited Kingdom
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Frequently asked questions about Zidesamtinib

What is Zidesamtinib used for?

Zidesamtinib is an investigational small molecule being studied for the treatment of locally advanced solid tumors, specifically in patients with advanced non-small cell lung cancer and other solid tumors that harbor ROS1 rearrangement. It is currently in Phase 1 clinical development.

What does Zidesamtinib target?

Zidesamtinib is a kinase inhibitor, as indicated by its '-tinib' suffix. It is being studied in tumors that harbor ROS1 rearrangement, suggesting it targets ROS1 kinase. The drug is designed to interfere with cancer cell signaling pathways driven by this genetic alteration.

Who makes Zidesamtinib?

Zidesamtinib is being developed by Nuvalent, Inc., a biopharmaceutical company traded on the stock exchange under the ticker symbol NUVL. The company is conducting clinical trials to evaluate the drug's safety and efficacy in patients with advanced solid tumors.

What phase is Zidesamtinib in?

Zidesamtinib is currently in Phase 1 clinical trials. It is an investigational drug and has not yet been approved by regulatory authorities. The drug has received Breakthrough Therapy and Orphan Drug designations from the FDA, which are intended to expedite its development and review.

What clinical trials is Zidesamtinib in?

Zidesamtinib is being evaluated in a Phase 1 clinical trial with the identifier NCT05118789, known as the ARROS-1 study. This trial is recruiting patients with advanced NSCLC and other solid tumors harboring ROS1 rearrangement, with an enrollment target of 359 participants across multiple countries.

Is Zidesamtinib the same as NVL-520?

Yes, Zidesamtinib is also known as NVL-520. Both names refer to the same investigational drug being developed by Nuvalent, Inc. for the treatment of advanced solid tumors with ROS1 rearrangement.