A Study to Allow Continued Dosing and/or Follow-up of Patients Who Have Had Previous Exposure to Poziotinib

An Open-Label Extension Study to Allow Continued Dosing and/or Follow-up of Patients Who Have Had Previous Exposure to Poziotinib

This is an open-label extension study (Extension Study) designed to allow patients to continue to receive poziotinib treatment who have had previous exposure to poziotinib and/or are still receiving clinical benefit from treatment, as judged by the Investigator or treating physician. Patients must begin treatment in this study within 28 days after their last dose of poziotinib.

This extension protocol is intended to provide clinical benefit of poziotinib to patients who are responding to treatment. The additional treatment is optional and voluntary.

Study Overview

• Status: Terminated
• Conditions: Breast Cancer; NSCLC
• Intervention / Treatment: Drug: Poziotinib

Detailed Description

Patients who wish to participate in the extension study must provide written Informed Consent. Treatment will begin after completion of the End of Study (EOS) or End of Treatment (EOT) visit of the Original Study. The assessments obtained at the EOS or EOT visit will serve as Baseline data for the extension study.

Patients will continue to receive poziotinib treatment at the last dose received or at the standard starting dose of 16 milligrams (mg) poziotinib, once daily.

Patients may receive treatment as long as the patient is deriving clinical benefit, as judged by the investigator or treating physician (case-by-case decision with approval of Spectrum), death, withdrawal of consent, unacceptable toxicity, lost to follow-up, or poziotinib receives commercial approval in their country of residence or development is terminated by the Sponsor, whichever occurs first. There will be an EOS Visit 35 (±5) days after the last dose of poziotinib.

• Study Type: Interventional
• Enrollment (Actual): 7
• Phase: Phase 2

Contacts and Locations

Study Locations

• United States
  • California
    • Long Beach, California, United States, 90813
      • Pacific Shores Medical Group
  • Mississippi
    • Hattiesburg, Mississippi, United States, 39401
      • Hattiesburg Clinic Hematology Oncology
  • New York
    • New York, New York, United States, 10016
      • Laura and Isaac Perlmutter Cancer Center at NYU Langone
  • Pennsylvania
    • Pittsburgh, Pennsylvania, United States, 15232
      • UPMC
  • Texas
    • Houston, Texas, United States, 77030
      • UT MD Anderson Cancer Center

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

• Patient has had previous exposure to poziotinib and is still receiving clinical benefit from treatment, as judged by the Investigator or treating physician.
• Patient must have completed the End of Treatment or End of Study visit if enrolled in a previous (original) poziotinib study.
• Investigator or treating physician opinion indicates that extended therapy with poziotinib is clinically appropriate for the patient and the patient is suitable for this Study.
• Patient agrees to continue study treatment.
• Patient must provide written Informed Consent, must be able to adhere to dosing and visit schedules, and meet protocol-defined study requirements.
• Patient is willing to practice 2 forms of contraception, one of which must be a barrier method, from study entry until at least 30 days after the last dose of poziotinib.

Exclusion Criteria:

• Patient has any ongoing adverse event that hasn't improved to Grade ≤1 and could impact the patient's tolerability to poziotinib.
• Patient has an active uncontrolled infection, bleeding disorder, underlying medical condition, or other serious illness that would impair the ability of the patient to receive poziotinib.
• Patient has any medical or non-medical condition that may not be suitable for poziotinib treatment, as determined by the investigator or treating physician.
• Patient last dose of poziotinib was more than 28 days prior to Day 1 of the study.
• Patient is pregnant or breastfeeding.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Poziotinib; Poziotinib will be taken by the patient orally, once daily with food and a glass of water at approximately the same time. The dose will be the last dose received or at the standard starting dose of 16 mg poziotinib. If a dose is missed, it may be taken any time during the day preferably with food, but at least 8 hours prior to the next scheduled dose.	Drug: Poziotinib; Poziotinib

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Number of Participants With Adverse Events (AEs)	An AE is any untoward medical occurrence in a participant or clinical investigation participant administered a pharmaceutical product and that does not necessarily have a causal relationship with this treatment. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease temporally associated with the use of a medicinal (investigational) product, whether or not related to the medicinal (investigational) product.	Up to 18 months

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Overall Response Rate (ORR)	ORR was defined as the percentage of participants with confirmed complete response (CR) and partial response (PR) as assessed by the investigator using local radiology evaluation according to Response Evaluation Criteria in Solid Tumors, Version 1.1 (RECIST v1.1). CR is defined as the disappearance of all target and non-target lesions. Any pathological lymph nodes must have a reduction in the short axis to <10 millimeters (mm). PR is defined as at least a 30% decrease in the sum of diameters of all target lesions, taking as reference the baseline sum of diameters, in the absence of CR.	Up to 17 months
Disease Control Rate (DCR)	DCR is defined as percentage of participants with best response of CR, PR, and stable disease (SD) from the first dose of poziotinib to the end of study. CR is defined as disappearance of all target and non-target lesions. Any pathological lymph nodes must have reduction in short axis to <10 mm. PR is defined as at least a 30% decrease in the sum of diameters of all target lesions, taking as reference the baseline sum of diameters, in the absence of CR. SD is defined as neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for progressive disease (PD), taking as reference the smallest sum diameters while on study.	Up to 17 months
Duration of Response (DOR)	Duration of response was defined as the time from the date that measurement criteria are first met for CR or PR until the first subsequent date that progressive disease or death is documented. CR is defined as the disappearance of all target and non-target lesions. Any pathological lymph nodes must have a reduction in the short axis to <10 mm. PR is defined as at least a 30% decrease in the sum of diameters of all target lesions, taking as reference the baseline sum of diameters, in the absence of CR. Disease progression is defined as ≥20% increase in the sum of diameters of target lesions, unequivocal progression in non-target lesions, and/or appearance of new lesions.	Up to 17 months
Progression Free Survival (PFS)	PFS was the duration of time from first administration of study treatment to date of first documented disease progression or death from any cause. Per RECIST v1.1 for target lesions, PD was defined as ≥20% increase in the sum of diameters of target lesions, unequivocal progression in non-target lesions, and/or appearance of new lesions.	Up to 17 months

Collaborators and Investigators

• Sponsor: Spectrum Pharmaceuticals, Inc

Study record dates

Study Major Dates

• Study Start (Actual): October 11, 2018
• Primary Completion (Actual): March 3, 2023
• Study Completion (Actual): March 3, 2023

Study Registration Dates

• First Submitted: November 8, 2018
• First Submitted That Met QC Criteria: November 14, 2018
• First Posted (Actual): November 16, 2018

Study Record Updates

• Last Update Posted (Actual): July 28, 2026
• Last Update Submitted That Met QC Criteria: June 30, 2026
• Last Verified: June 1, 2026

More Information

Terms related to this study

• Keywords: HER2; EGFR; Exon 20 insertion mutation; Poziotinib
• Additional Relevant MeSH Terms: Neoplasms by Site; Neoplasms; Skin Diseases; Breast Diseases; Skin and Connective Tissue Diseases; Breast Neoplasms; HM781-36B
• Other Study ID Numbers: SPI-POZ-501; 2020-005213-40 (EudraCT Number)

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: UNDECIDED

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: Yes
• Studies a U.S. FDA-regulated device product: No