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A Phase 3, multicenter, randomized, double-blind, placebo-controlled, parallel-design study to assess the efficacy, safety, and tolerability of AVP-786 (deudextromethorphan hydrobromide [d6-DM]/quinidine sulfate [Q]) for the treatment of agitation in patients with dementia of the Alzheimer’s type

Otsuka Pharmaceutical Development & Commercialization, Inc

Information about the drug that will be tested in the study


A capsule taken orally twice a day

Is the drug already on the market for another medical condition?


Will all participants receive the same drug?

Participants will be selected at random to either receive one of the following options:

  • A capsule of AVP-786 administered twice daily (dose 1)
  • A capsule of AVP-786 administered twice daily (dose 2)
  • One placebo capsule (also called a dummy treatment which is an inactive substance identical in appearance to the drug being tested with no active therapeutic effect) administered twice daily.

Neither the participant nor his/her doctor will know if the person is receiving the investigational drug or the placebo.

Information about participating in the trial

What are the researchers trying to find out?

The purpose of this study is to evaluate the safety and efficacy of AVP-786 for the treatment of agitation in people with dementia of the Alzheimer's type

How long will the treatment last?

12 weeks

What your involvement will entail?

During the study, participants (and/or their caregivers) will be asked to complete different tests that will assess the participants’ behaviour, functioning, quality of life, cognition and the level of burden on the caregiver.

Further information on the procedures, tests and number of visits can be obtained from the study team.

Who can participate in this study?

Who can participate in the study?

To take part in the study, participants must:

  • Be between 50 and 90 years old
  • Have a diagnosis of Alzheimer’s disease and have moderate or severe agitation
  • Have agitation symptoms that interferes with daily routine

Have a study partner who is willing and able to comply with study procedures. The caregiver should spend at least 2 hours per day for 4 days per week with the participant.

Who cannot participate in the study?

People cannot take part in the study if they have or have experienced:

  • Any medical or neurological condition (other than Alzheimer’s disease) that might be a contributing cause of the dementia or agitation
  • A disease that may interfere with the safety or study assessments (e.g., malignancy, poorly controlled diabetes, uncontrolled hypertension, unstable pulmonary, renal or hepatic disease, uncontrolled or significant cardiac disease)
  • Myasthenia gravis (neuromuscular disease that causes weakness in the skeletal muscles).

The above list is not exhaustive. It includes the most common conditions and diseases that might exclude people from the study.

Information for your doctor

EudraCT Number

2017-001339-38 identifier


Study contact information

Link to full text

The information contained in this document is based on information available on public registries (e.g. website) on March 2022.

This document has been reviewed by the pharmaceutical company running this trial.

This document has been reviewed by a member of the European Working Group of People with Dementia.


Alzheimer Europe's Clinical Trials Watch database was developed as part of the 2018 Work Plan which received funding under an operating grant from the European Union’s Health Programme (2014–2020).

Alzheimer Europe gratefully acknowledges the support of its corporate sponsors for the update and maintenance of the database.