A Phase 2b Study of SPI-1005 to Prevent Acute Noise Induced Hearing Loss (PANIHL)

June 1, 2026 updated by: Sound Pharmaceuticals, Incorporated

A Phase 2b, Randomized, Double-blinded, Placebo-controlled Study to Evaluate the Safety and Efficacy of SPI-1005 to Prevent Acute Noise Induced Hearing Loss (PANIHL)

SPI-1005 is a novel oral drug that contains a glutathione peroxidase mimetic (ebselen) that will be tested in subjects with a history of NIHL at risk for additional NIHL. The goal of this multi-center Phase 2b study is to determine whether SPI-1005 is effective in reducing an acute NIHL in this affected population. In this Phase 2b study subjects with prior NIHL will be enrolled and exposed to a calibrated sound challenge (CSC) that induces a slight acute NIHL.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Withdrawn

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

Randomized, double-blind, placebo-controlled, safety and efficacy study of oral SPI-1005 in adults with Noise Induced Hearing Loss (NIHL). All recruited subjects will have their severity of NIHL determined before the start of SPI-1005 treatment using various hearing tests. Subjects will be enrolled and randomized to either placebo or SPI-1005. Subjects will be dosed with either placebo or SPI-1005 for 7 days, beginning 1 day before an acute NIHL. Subjects will have hearing tests performed before and immediately after a calibrated sound challenge (CSC). Follow-up hearing tests will be performed post-CSC.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 2

Contacts and Locations

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

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Locations

  • United States
    • Florida
      • Miami, Florida, United States, 33136
        • University of Miami
    • Kansas
      • Kansas City, Kansas, United States, 66103
        • University of Kansas Medical Center
    • South Carolina
      • Charleston, South Carolina, United States, 29425
        • MUSC
    • Texas
      • Dallas, Texas, United States, 75390
        • University of Texas Southwestern
    • Washington
      • Seattle, Washington, United States, 98103
        • Sound Pharmaceuticals, Inc.

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

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years to 50 years (Adult)

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  • Adult male or female patients, 18-50 years of age
  • History of either recreational and/or occupational exposure to noise
  • Voluntarily consent to participate in the study
  • Females of childbearing potential should be using and committed to continue using one of the following acceptable birth control methods: Sexual abstinence (inactivity) for 14 days prior to screening through study completion; or intra-uterine device in place for at least 3 months prior to study through study completion; or barrier method (condom or diaphragm) with spermicide for at least 14 days prior to screening through study completion; or stable hormonal contraceptive for at least 3 months prior to study through study completion; or surgical sterilization (vasectomy) of partner at least 6 months prior to study.
  • Females of non-childbearing potential should be surgically sterile (bilateral tubal ligation with surgery at least 6 months prior to study, hysterectomy, or bilateral oophorectomy at least 2 months prior to study) or be at least 3 years since last menses.

Exclusion Criteria:

  • Current use or within 60 days prior to study of excluded ototoxic medications
  • History of autoimmune inner ear disease
  • History of middle ear or inner ear surgery
  • Current conductive hearing loss or middle ear effusion
  • Significant cardiovascular, pulmonary, hepatic, renal, hematologic, gastrointestinal, endocrine, immunologic, or psychiatric disease
  • History of hypersensitivity or idiosyncratic reaction to compounds related to ebselen
  • Current use or within 30 days prior to study of drugs or substances known to be strong inhibitors or inducers of cytochrome P450 enzymes
  • Participation in another investigational drug or device study within 90 days prior to study enrollment
  • Female patients who are pregnant or breastfeeding

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?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Quadruple

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Active Comparator: SPI-1005 200 mg
200 mg SPI-1005, capsule, bid, po, x7d
Drug: SPI-1005 200mg
Oral SPI-1005 capsules, 200 mg ebselen, twice daily, 7 days
Other Names:
  • Low Dose
Active Comparator: SPI-1005 400 mg
400 mg SPI-1005, capsule, bid, po, x7d
Drug: SPI-1005 400mg
Oral SPI-1005 capsules, 400 mg ebselen, twice daily, 7 days
Other Names:
  • High Dose
Placebo Comparator: Placebo
0 mg SPI-1005, capsule, bid, po, x7d
Drug: Placebo
Oral SPI-1005 capsules, 0 mg ebselen, twice daily, 7 days
Other Names:
  • Control

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Reduction in the Incidence of a Significant Threshold Shift
Time Frame: Within 1 day
Post Controlled Sound Challenge pure tone audiometry will be compared with baseline
Within 1 day

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Improvement in word recognition score
Time Frame: Within 1 day
Post Controlled Sound Challenge Words in Noise Test score will be compared with baseline
Within 1 day

Other Outcome Measures

Other Outcome Measures

For clinical trials, a planned measurement described in the protocol that is used to determine the effect of an intervention/treatment on participants. For observational studies, a measurement or observation that is used to describe patterns of diseases or traits, or associations with exposures, risk factors, or treatment. Types of outcome measures include primary outcome measure and secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Adverse events
Time Frame: Within 7 days
Adverse events due to study drug will be compared with placebo
Within 7 days

Collaborators and Investigators

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

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Sound Pharmaceuticals, Incorporated

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Study Chair: Jonathan Kil, MD, Sound Pharmaceuticals, Inc.

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 Major Dates

Study Start (Estimated)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
June 1, 2026

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
June 1, 2026

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
June 1, 2026

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
May 18, 2016

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
May 18, 2016

First Posted (Estimated)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
May 20, 2016

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
June 3, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
June 1, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
June 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • SPI-1005-203

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

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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