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Opioid Use DisorderPhase 1NCT05447286

Safety, Tolerability and Pharmacokinetics of NYX-783 and Oxycodone DDI Study

A Phase 1 study testing NYX-783 and Oxycodone in people with Opioid Use Disorder, run by Yale University at 2 sites in United States.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

This study proposes to examine the safety, tolerability, and pharmacokinetics (PK) of NYX-783 50 mg and 150 mg versus Placebo (PBO) in combination with acute Oxycodone 15 mg and 30 mg in an inpatient randomized, cross-over study in non-treatment seeking non-dependent, opioid experienced individuals with current… Read more about this study

Who is it for?
Ages 21 to 58 yearsHealthy volunteers can take part
Conditions the study is for
Opioid Use Disorder
What is being tested?
NYX-783 and Oxycodone
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
9 participants
Where
2 sitesUnited States
Study dates
15 May 2023to 30 Dec 2024
Phase
Phase 1
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 21 to 58 years
  • All sexes
  • Healthy volunteers accepted
  • Adult

Who may be able to join

  • Voluntary, written, informed consent.
  • full scale and verbal IQs > 80 (Shipley Institute of Living IQ Screening Test).
  • Non-treatment seeking, non-dependent, opioid-experienced participants with low, opioid use via smoking or oral pills routes and with no need for medical detoxification from opiates and without past 12-month history of overdoses or medical detoxification for opioid withdrawal.
  • Participants must agree to use dual contraceptive methods during the study and refrain from donating sperm or ova during study or for 28 days after final dose of drug for ova and for 90 days after final dose of drug for sperm. Dual contraceptive methods include the use of a barrier contraceptive (i.e., condoms) in addition to another effective method that can prevent pregnancy (i.e., oral or parenteral contraceptives, intrauterine devices, spermicide, etc.).
  • Ability to understand and comply with study requirements and restrictions and provide a secondary contact if they cannot be reached.

Who cannot join

  • Meet current DSM-5 criteria of moderate to severe Substance Use Disorder (SUD) on either sedative, hypnotics, cocaine, methamphetamine, opiates or alcohol.
  • Daily heroin, fentanyl use requiring opiate detoxification and treatment.
  • Regular daily prescribed use of anticonvulsants, sedatives/hypnotics, other antihypertensives, anti-arrhythmics, antiretroviral medications, naltrexone, antabuse, grapefruit juice and St. John's wort products, glucocorticoids, stimulants (amphetamine like compounds), CNS active medications (other than stabilized use of antidepressants and anti-anxiety medications), metformin, or other medications such as benzodiazepines and sedating antidepressants that in the opinion of the investigators interfere with the study.
  • Women who are pregnant or nursing (as assessed by pregnancy tests during initial intake and upon CNRU admissions).
  • HIV seropositivity, hepatitis or other acute ongoing infectious disease considered clinically significant by the investigator.
  • Traumatic brain injury with loss of consciousness.
Show all 26Show fewer
  • Individuals with current or past history of seizure disorders.
  • Current or recent diagnosis within past 6-months of Major Depressive Disorder (MDD), bipolar disorder, schizophrenia, and schizoaffective disorder.
  • History of a neurodegenerative or neuro-inflammatory disorder including Huntington's, Parkinson's, Alzheimer's disease, or multiple sclerosis.
  • Known familial history or known presence of long QT syndrome, or a known history of past or current clinically significant arrhythmias or ischemic heart disease.
  • History of gastrointestinal disease or surgery (except simply appendectomy or hernia repair), leading to impaired drug absorption.
  • Uncorrected hypothyroidism or hyperthyroidism. Participants with compensated hypothyroidism with normal thyroid-stimulating hormone levels may be enrolled.
  • Sensitivity, allergy, or intolerance to N-methyl-D-aspartate receptor (NMDAR) ligands including ketamine, dextromethorphan, memantine, methadone, dextropropoxyphene, or ketobemidone and magnesium. Use of NMDAR-binding drugs within 60 days prior to dosing or during the study.
  • Received an investigational product or device within 30 days of dosing (or 5 half-lives whichever is longer).
  • Previously received NYX-783.
  • Screening QT interval corrected for heart rate (HR) by Fridericia's formula (QTcF) > 450 (males) or 470 (females) milliseconds (msec) or an ECG that is not suitable for QT measurements (e.g., poorly defined termination of T-wave in the investigator's opinion.
  • Heart rate ≤45 or >90 bpm at screening
  • Creatinine clearance <60ml/min at screening or history of renal disease as assessed by Investigator.
  • Uncontrolled Type I or Type II diabetes or uncontrolled hypertension characterized by fasting blood glucose > 126 mg/dl or postprandial blood glucose > 200 mg/dl, resting systolic blood pressure >160 mm Hg or resting diastolic >100 mm Hg, or clinically significant hypotension in the judgement of the Investigator as characterized by resting systolic blood pressure <90 mm Hg or resting diastolic blood pressure <60 mm Hg.
  • Impaired hepatic function characterized by a previous known diagnosis of chronic liver disease and/or the presence of:
  • direct bilirubin > 1.5x the upper limit of normal at screening
  • alanine transaminase (ALT), aspartate transaminase (AST), alkaline phosphatase, or gamma-glutamyl transferase (GGT) > 2x the upper limit of normal at screening.
  • History of severe COVID-19 infection requiring hospitalization, treatment with oxygen or mechanical ventilation, that may interfere with study participation as assessment by the Investigator.
  • Any participant with a medical history of Covid-19 infection (positive test) within the last 2 months, or current symptoms consistent with Covid-19 infection, as assessed by the Investigator.
  • Donated blood during the past 8 weeks.
  • Participants who do not report an increase in subjective opioid effect, as measured by the Drug Effects Questionnaire (DEQ, see below) by minimum of 10% or more to initial challenge with oxycodone in Session 1 will be excluded from the DDI phase sessions 2-7.

Trial locations and contacts

2 sites in 1 country.

United States2 sites
  • Cmhc/Cnru

    New Haven, Connecticut, 06519

  • The Yale Stress Center: Yale University

    New Haven, Connecticut, 06519

Other trials in United States

About this study

Official title: Clinical Evaluation of NMDA Modulator NYX-783 for OUD: Randomized, Double-blind, Placebo-Controlled Study to Assess Safety, Tolerability, and Pharmacokinetics of NYX-783 in Combination With Oxycodone (Study 1)

This study proposes to examine the safety, tolerability, and pharmacokinetics (PK) of NYX-783 50 mg and 150 mg versus Placebo (PBO) in combination with acute Oxycodone 15 mg and 30 mg in an inpatient randomized, cross-over study in non-treatment seeking non-dependent, opioid experienced individuals with current recreational use.

Read the detailed description

Outcomes will be cardiovascular (ECG monitoring, heart rate, blood pressure), respiratory, Clinical Opioid Withdrawal Scale (COWS), treatment emergent adverse events (TEAEs), and PK of NYX-783 levels in combination with Oxycodone. Secondary outcomes will be drug effects, subjective opiate withdrawal scale (SOWS), Drug Effects Questionnaire (DEQ), pupillary diameter, the Opioid Symptom Checklist (OSC), craving, stress and pain, and study drug levels during NYX-783 and Oxycodone combination challenge sessions.

Being tested
NYX-783, Placebo, Oxycodone
Medical subject headings
Opioid-Related Disorders

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • NYX-783Drug

    Also called ((2S, 3R)-3-hydroxy-2-((S)-5-isobutyryl-1-oxo-2,5-diazaspiro[3.4]octan-2-yl)butanamide)

    This study proposes to examine the safety, tolerability, and pharmacokinetics (PK) of NYX-783 at 50 mg and 150 mg doses versus Placebo (PBO) in combination with acute Oxycodone 15 mg and 30 mg in an inpatient randomized, cross-over study over 6 experimental sessions.

  • PlaceboDrug

    This study proposes to examine the safety, tolerability, and pharmacokinetics (PK) of NYX-783 at 50 mg and 150 mg doses versus Placebo (PBO) in combination with acute Oxycodone 15 mg and 30 mg in an inpatient randomized, cross-over study over 6 experimental sessions.

  • OxycodoneDrug

    This study proposes to examine the safety, tolerability, and pharmacokinetics (PK) of NYX-783 at 50 mg and 150 mg doses versus Placebo (PBO) in combination with acute Oxycodone 15 mg and 30 mg in an inpatient randomized, cross-over study over 6 experimental sessions.

Study groups in NCT05447286
Study groupRoleWhat they receive
Placebo + OxycodonePlacebo comparatorParticipants will receive placebo with + 15 mg oxycodone then placebo + 30 mg oxycodone in separate inpatient randomized sessions in this, cross-over study over 6 experimental sessions.
Receives: Drug: Placebo; Drug: Oxycodone
NYX-783: 50 mg dose + OxycodoneActive comparatorParticipants will receive NYX-783 50 mg dose with + 15 mg oxycodone then NYX-783 50 mg + 30 mg oxycodone in separate inpatient randomized sessions in this, cross-over study over 6 experimental sessions.
Receives: Drug: NYX-783; Drug: Oxycodone
NYX-783: 150 mg dose + OxycodoneActive comparatorParticipants will receive NYX-783 150 mg dose with + 15 mg oxycodone then NYX-783 150 mg + 30 mg oxycodone in separate inpatient randomized sessions in this, cross-over study over 6 experimental sessions.
Receives: Drug: NYX-783; Drug: Oxycodone

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Change in respiratory rate

    Change in respiratory rate pre and post drug administration measured by counting breaths

    Measured: over 6 sessions from baseline up to 3 weeks

  2. Change in oxygenation saturation

    Change in oxygenation saturation pre and post drug administration measured by pulse-oximeter

    Measured: over 6 sessions from baseline up to 3 weeks

  3. Change in blood pressure

    Change in blood pressure pre and post drug administration measured by blood pressure monitor

    Measured: over 6 sessions from baseline up to 3 weeks

  4. Change in heart rate

    Change in heart rate pre and post drug administration measured by blood pressure monitor

    Measured: over 6 sessions from baseline up to 3 weeks

  5. Change in body temperature

    Change in body temperature pre and post drug administration measured by temperature monitor

    Measured: over 6 sessions from baseline up to 3 weeks

  6. Change in cardiac rate

    Change in cardiac rate pre and post drug administration measured by EKG cardiac monitor

    Measured: over 6 sessions from baseline up to 3 weeks

  7. Change in cardiac rhythm

    Change in cardiac rhythm pre and post drug administration measured by EKG cardiac monitor

    Measured: over 6 sessions from baseline up to 3 weeks

Secondary outcomes (7)
  1. treatment emergent adverse events (TEAES) from Systematic Assessment for Treatment Emergent Effects (SAFTEE)

    The SAFTEE is a technique for the systematic assessment of side effects in clinical trials that rates the current severity of a wide range of somatic, behavioral and affective symptoms and tabulates occurrence of each TEAE symptom

    Measured: over 6 sessions from baseline up to 3 weeks

  2. Change in Clinical Opiate Withdrawal Scale (COWS)

    COWS is an 11-item scale to rate common signs and symptoms of opiate withdrawal and monitor these symptoms over time. The summed score determines the stage/severity of opiate withdrawal and assess the level of physical dependence on opioids. Score: 5- 12 = mild; 13-24 = moderate; 25-36 = moderately severe; more than 36 = severe withdrawal

    Measured: over 6 sessions from baseline up to 3 weeks

  3. Change in Subjective Opioid Withdrawal Scale (SOWS)

    SOWS is a self-administered scale for opioid withdrawal symptoms. It has16 symptoms whose intensity is rated on a scale of 0 (not at all) to 4 (extremely). Mild Withdrawal = score of 1-10, Moderate withdrawal = 11-20, Severe withdrawal = 21-30

    Measured: over 6 sessions from baseline up to 3 weeks

  4. Change in Drug Effects Questionnaire (DEQ)

    The DEQ measures Good Drug Effect and consists of 11 questions with total score range from 0-100. Higher scores indicate more positive effects.

    Measured: over 6 sessions from baseline up to 3 weeks

  5. Change in Visual Analog Scale (VAS)

    The VAS scales are 5 item drug effect self report ratings The visual analog questions were "Do you feel any Drug Effect?" "Do you like the drug?" "How high are you?" "Does the drug have any Good Effects?" "Does the drug have any Bad Effects?" and "How much do you DESIRE opiates?" The subjects responded by positioning an arrow along a 100-point line labeled with "not at all" at one end and "extremely" at the other. High scores show drug effect and craving, low scores show low drug effect and low craving

    Measured: over 6 sessions from baseline up to 3 weeks

  6. Change in Opioid Symptom Checklist (OSC)

    The OSC is a 13-item opioid symptom checklist consisting of true/false questions designed to measure opioid effects (e.g., "My skin is itchy"). True scores total up to acute opiate positive and negative symptoms and low true scores will mean not feeling any of the negative and positive symptoms.

    Measured: over 6 sessions from baseline up to 3 weeks

  7. Change in pupillary diameter

    pupil diameter size using pupilometer

    Measured: over 6 sessions from baseline up to 3 weeks

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted7 Jul 2022
  2. Study start15 May 2023
  3. Primary completion30 Dec 2024
  4. Study completion30 Dec 2024

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 1
Primary purpose
Other
Allocation
Randomised
Intervention model
Crossover
Masking
Quadruple blind
Who is masked
Participant, Care provider, Investigator, Outcomes assessor
Enrolment
9 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT05447286
Sponsor's protocol ID
2000033008
Other IDs
UG3DA050322, NYX-783-1009
Status last verified
Mar 2025
First submitted
21 Jun 2022
Last updated
25 Mar 2025
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
No

Questions about this trial

What is this clinical trial studying?

A Phase 1 study testing NYX-783 and Oxycodone in people with Opioid Use Disorder, run by Yale University at 2 sites in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 5 inclusion and 26 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 25 Mar 2025. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 2 sites in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Change in respiratory rate (time frame: over 6 sessions from baseline up to 3 weeks). The study lists 7 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 25 Mar 2025.

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