Post-Trial Access to ATH434 for Patients With Multiple System Atrophy

April 9, 2026 updated by: Alterity Therapeutics
This multicenter post-trial access program is designed to provide ATH434 orally BID to eligible patients who completed Phase 2 studies ATH434-201 or ATH434-202, and who may benefit from this treatment according to the evaluation by their treating physicians.

Study Overview

Status

Available

Conditions

Intervention / Treatment

Detailed Description

This multicenter PTA program is designed to provide ATH434 orally BID to eligible patients who have completed the ATH434-201 or ATH434-202 Phase 2 clinical trials, and who may benefit from this treatment according to evaluation by their treating physician. Up to 20 patients will be enrolled in the US.

For each patient, treating physicians will request participation in the PTA study and initial ATH434 shipment for patients who meet entry criteria. Upon review and approval by the Medical Monitor/Sponsor, treating physicians will obtain informed consent from the patient and proceed with ATH434 initiation under the PTA program. Pertinent documented medical information will be requested to confirm eligibility and assess patient safety throughout the PTA program.

Eligible patients will receive ATH434 tablets BID to be taken with food for up to 12 months, and will complete in-clinic and remote visits for safety and to dispense/return ATH434.

Study Type

Expanded Access

Expanded Access Type

  • Intermediate-size Population

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

N/A

Description

Inclusion Criteria:

  • Completed Alterity protocol ATH434-201 or ATH434-202
  • Expected to benefit from treatment from treatment with ATH434, in the opinion of the treating physician

Exclusion Criteria:

  • Discontinued prior ATH434 treatment (ATH434-201 or ATH434-202) for any reason
  • Significant medical or psychiatric condition that may decrease the benefit-risk ratio of participation in this program to an unacceptable level, as per the treating physician's opinion

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Alterity Therapeutics

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Registration Dates

First Submitted

April 9, 2026

First Submitted That Met QC Criteria

April 9, 2026

First Posted (Actual)

April 15, 2026

Study Record Updates

Last Update Posted (Actual)

April 15, 2026

Last Update Submitted That Met QC Criteria

April 9, 2026

Last Verified

March 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • ATH434-901

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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