Pharmacokinetics (PK) and Tolerability of AVP-786 in Healthy Volunteers

April 23, 2026 updated by: Otsuka Pharmaceutical Development & Commercialization, Inc.

A Phase 1, Single-center, Randomized, Double-blind, Study to Assess the Pharmacokinetics, Safety and Tolerability of Single and Multiple Doses of AVP-786 (Deuterated Dextromethorphan) in Healthy Volunteers

To assess the single- and multiple-dose pharmacokinetic (PK), safety and tolerability of AVP-786 in healthy volunteers.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

48

Phase

  • Phase 1

Contacts and Locations

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

Study Locations

  • Australia
    • South Australia
      • Adelaide, South Australia, Australia, 5000
        • CMAX

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

18 years to 45 years (Adult)

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  • Healthy adult males
  • 18 - 45 years of age
  • BMI 18 - 30 kg/m2

Exclusion Criteria:

  • History or presence of significant disease
  • History of substance and/or alcohol abuse within the past 3 years
  • Use of tobacco-containing or nicotine-contining products within 6 months
  • Use of any prescription of over-the-counter (OTC) medication within 14 days

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: Other
  • Allocation: Randomized
  • Interventional Model: Crossover Assignment
  • Masking: Quadruple

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Cohorts A and C
Single dose (D1) followed by twice daily dosing for 7 days
Drug: AVP-923
Drug: AVP-786 Dose 1
Experimental: Cohorts B and D
Single dose (D1) followed by twice daily dosing for 7 days
Drug: AVP-923
Drug: AVP-786 Dose 2
Experimental: Cohorts E and F
Single dose (D1) followed by twice daily dosing for 7 days
Drug: AVP-923
Drug: AVP-786 Dose 1/Q Dose 1
Experimental: Cohorts G and I
Single dose (D1) followed by twice daily dosing for 7 days
Drug: AVP-923
Drug: AVP-786 Dose 1/Q Dose 2
Experimental: Cohorts H and J
Single dose (D1) followed by twice daily dosing for 7 days
Drug: AVP-923
Drug: AVP-786 Dose 2/Q Dose 2

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Plasma concentrations of parent and metabolites
Time Frame: 8 Days
8 Days

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Safety and tolerability
Time Frame: 8 days
Assessments to include Physical Examination (PE), Labs, ECGs, and Adverse Events (AEs)
8 days

Collaborators and Investigators

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

Sponsor

Otsuka Pharmaceutical Development & Commercialization, Inc.

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

Helpful Links

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 (Actual)

October 1, 2012

Primary Completion (Actual)

February 1, 2013

Study Completion (Actual)

February 1, 2013

Study Registration Dates

First Submitted

February 6, 2013

First Submitted That Met QC Criteria

February 7, 2013

First Posted (Estimated)

February 11, 2013

Study Record Updates

Last Update Posted (Actual)

April 28, 2026

Last Update Submitted That Met QC Criteria

April 23, 2026

Last Verified

April 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 12-AVR-132

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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