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[Proef met een apparaat dat niet is goedgekeurd of vrijgegeven door de U.S. FDA]

22 juni 2026 bijgewerkt door: Joy Schmitz, The University of Texas Health Science Center, Houston

[Proef met apparaat dat niet is goedgekeurd of vrijgegeven door de Amerikaanse FDA]

The purpose of this study is to evaluate the effects of Contingency Management (CM)+transcranial magnetic stimulation (TMS) on treatment outcomes in individuals who are initial non-responders and to evaluate the effects of CM+TMS on putative mechanisms of change

Studie Overzicht

Studietype

Ingrijpend

Inschrijving (Geschat)

100

Fase

  • Niet toepasbaar

Contacten en locaties

In dit gedeelte vindt u de contactgegevens van degenen die het onderzoek uitvoeren en informatie over waar dit onderzoek wordt uitgevoerd.

Studiecontact

Studie Contact Back-up

Studie Locaties

Deelname Criteria

Onderzoekers zoeken naar mensen die aan een bepaalde beschrijving voldoen, de zogenaamde geschiktheidscriteria. Enkele voorbeelden van deze criteria zijn iemands algemene gezondheidstoestand of eerdere behandelingen.

Geschiktheidscriteria

Leeftijden die in aanmerking komen voor studie

  • Volwassen
  • Oudere volwassene

Accepteert gezonde vrijwilligers

Ja

Beschrijving

Inclusion Criteria:

  • Able to provide informed consent before any study-related activity, willing to comply with all study procedures, and be available for the duration of the study.
  • Meet Diagnostic and Statistical Manual of Mental Disorders, 5th Edition (DSM-5) diagnostic criteria for moderate-to-severe CUD and report recent cocaine use (verified by at least one positive urine drug screen (UDS) for the cocaine metabolite benzoylecgonine (BE), during intake).
  • Agree (if the participant is female and of child-bearing potential) to use effective contraceptive methods, unless the participant's male partner(s) is surgically sterile (underwent vasectomy).

Acceptable contraceptives include:

  1. oral contraceptives
  2. contraceptive sponge
  3. patch
  4. double barrier (diaphragm/spermicidal or condom/spermicidal)
  5. intrauterine contraceptive system
  6. etonogestrel implant
  7. medroxyprogesterone acetate contraceptive injection
  8. complete abstinence from sexual intercourse
  9. hormonal vaginal ring

Contraceptive measures sold for emergency use after unprotected sex are not acceptable methods for routine use.

  • Women of child-bearing potential must provide negative urine pregnancy test prior to randomization.
  • Be able to provide the names and contact information of at least 2 persons who can consistently locate their whereabouts

Exclusion Criteria:

  • Current DSM-5 diagnosis for substance use disorder (of at least moderate severity) other than cocaine, cannabis, or nicotine or a substance Use Disorder (SUD) requiring medical detoxification (e.g., alcohol, opioid, benzodiazepine)
  • Presence of any medical, neurological, psychiatric, or physical condition, disease, or illness (including psychosis and bipolar disorder) that, in the opinion of the PIs and the Certified Registered Nurse Anesthetist (CNRA)Medical Director could: (a) compromise interfere, limit, or reduce the subject's ability to complete the study; or (b) adversely impact the safety of the subject or the integrity of the data.
  • Has current or recent (within 3 months of potential enrollment) suicidal ideation, suicidal behavior, homicidal ideation or a homicidal plan sufficient to raise subject safety concerns based on the following assessments:

    1. Structured Clinical Interview for DSM-5 (SCID-5)
    2. Columbia-Suicide Severity Rating Scale - Answers YES to Questions 3, 4, 5, or 6
    3. Assault & Homicidal Danger Assessment Tool - Key to Danger > 1
  • Any contraindications to MRI scans (metal in the body; claustrophobia). -Medical implants contraindicating TMS (i.e., aneurysm clips or coils, stents, implanted stimulators, implanted vagus nerve or deep brain stimulators, implanted electrical devices such as pacemakers or medication pumps, electrodes for monitoring brain activity, cochlear implants for hearing, any magnetic implants, bullet fragments, any other metal device or object implanted in your body closer than 30 cm from the coil).
  • History of brain surgery.
  • History of an intracranial lesion or any medical or neurological diagnosis/condition associated with increased intracranial pressure (i.e., Idiopathic Intracranial Hypertension/Pseudotumor Cerebri) OR any of the following symptoms within 30 days of enrollment: headaches > 15 days/month, loss of vision or decreased vision
  • Moderate-to-severe heart disease.
  • History of stroke.
  • Taking any antidepressant or antipsychotic medication at a dose above the maximum recommended dose or at a dose deemed to be potentially unsafe according to the study physician; has taken any of the following medications, which are known to increase the risk of seizures, within 1 week of study enrollment; or does not agree to abstain from taking the following medications during study participation:

    1. clozapine
    2. chlorpromazine
    3. bupropion
    4. clomipramine hydrochloride
    5. amoxapine
    6. maprotiline hydrochloride
    7. diphenhydramine
    8. stimulants other than cocaine including the following:
    9. Dextroamphetamine and amphetamine ii. Dextroamphetamine iii. Lisdexamfetamine dimesylate iv. Methamphetamine

    v. Methylphenidate i. tramadol j. isoniazid.

  • Personal history of epilepsy or seizure disorder and/or family history including a first degree relative
  • Serious head injury with loss of consciousness
  • Having conditions of probation or parole requiring reports of drug use to officers of the court or impending incarceration
  • For adolescent aged participants (18-21 only): any risk factor for neurocardiogenic syncope (history of syncope/ presyncope related to noxious stimuli, anxiety, micturition, or posture).
  • Pregnant or nursing for female participants
  • Inability to read, write, or speak English.

Studie plan

Dit gedeelte bevat details van het studieplan, inclusief hoe de studie is opgezet en wat de studie meet.

Hoe is de studie opgezet?

Ontwerpdetails

  • Primair doel: Behandeling
  • Toewijzing: Gerandomiseerd
  • Interventioneel model: Parallelle opdracht
  • Masker: Verviervoudigen

Wapens en interventies

Deelnemersgroep / Arm
Interventie / Behandeling
Experimenteel: CM for 2 weeks then CM only
Participants will have thrice-weekly (Monday, Wednesday and Friday) clinic visits, during which participants can earn rewards for submitting a cocaine-negative UDS.CM sessions will consist of the following components: 1) brief discussion of any substance use/cravings since prior CM session; 2) verification that the target behavior (abstinence) was achieved; 3) if achieved, provide incentives and discuss individual plans to use the earnings; 4) if not achieved, review the goals of CM and plans to continue engaging in treatment.
Sham-vergelijker: CM for 2 weeks, then TMS sham plus CM
Participants will have thrice-weekly (Monday, Wednesday and Friday) clinic visits, during which participants can earn rewards for submitting a cocaine-negative UDS.CM sessions will consist of the following components: 1) brief discussion of any substance use/cravings since prior CM session; 2) verification that the target behavior (abstinence) was achieved; 3) if achieved, provide incentives and discuss individual plans to use the earnings; 4) if not achieved, review the goals of CM and plans to continue engaging in treatment.
The sham stimulations with negligible induced electric fields, delivered via the same H4 coil to mimic the acoustic characteristics and scalp sensations of active H4 will be used.
Experimenteel: CM for 2 weeks, then TMS experimental plus CM

Wat meet het onderzoek?

Primaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Number of participants who test negative for cocaine use as assessed by urine drug screen
Tijdsspanne: from Baseline to Week 11
this will be measured measured 3 times per week throughout the study
from Baseline to Week 11
Cocaine craving as assessed by cocaine craving questionnaire (CCQ)
Tijdsspanne: from Baseline to Week 11
this will be administered weekly. This is a 45 item questionnaire and each is scored on a Likert scale from 1( strongly disagree), to 7(strongly agree). Score range is 45 (minimum) - 315 (maximum).Higher scores indicate greater cocaine craving.
from Baseline to Week 11

Secundaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Change in Cue-induced craving as assessed by VAS during cue task
Tijdsspanne: Baseline, Week 2, Week 11
Cue-induced craving will be assessed with a 100-pt Visual Analogue Scale (VAS) that will ask "How much are you craving cocaine right now?" before and after exposure to an EEG Picture Viewing Task that will display cocaine, emotional, and neutral images. Higher score indicates more craving.
Baseline, Week 2, Week 11
Change in amplitude of the Late Positive Potential (LPP) in Microvolts in Response to Visual Stimuli on the Picture Viewing Task as Assessed by EEG
Tijdsspanne: Baseline, Week 2, Week 11
The Picture Viewing Task will be used to elicit the late positive potential (LPP), reflecting the motivational salience of a stimulus. During this task, participants are asked to view a slideshow of images including pleasant, unpleasant, neutral, and cocaine-related images. The amplitude of the LPP in microvolts in response to visual stimuli is reported.
Baseline, Week 2, Week 11
Change in Functional Connectivity between the Bilateral anterior insula (AIn) and central amygdala (CeA) as measured by Functional Magnetic Resonance Imaging (fMRI)
Tijdsspanne: Baseline, Week 2, Week 11
Functional connectivity between bilateral anterior insula and central amygdala regions will be quantified using resting-state functional magnetic resonance imaging and seed-based connectivity analysis.
Baseline, Week 2, Week 11
Change in Phenotype assessment battery (PhAB) as assessed by addiction domains of cognition, reward, and negative emotionality
Tijdsspanne: Baseline, Week 2, Week 11
The Phenotype Assessment Battery (PhAB) assesses addiction-related domains including cognition, reward processing, and negative emotionality using a standardized battery of behavioral tasks and self-report measures. Individual measure scores are calculated according to established scoring procedures and converted to standardized scores. Standardized scores within each domain are combined to generate domain-specific composite scores. Composite scores are continuous measures without a fixed range, with higher scores indicating greater impairment within the respective domain.
Baseline, Week 2, Week 11

Medewerkers en onderzoekers

Hier vindt u mensen en organisaties die betrokken zijn bij dit onderzoek.

Onderzoekers

  • Hoofdonderzoeker: Joy M Schmitz, PhD, The University of Texas Health Science Center, Houston

Studie record data

Deze datums volgen de voortgang van het onderzoeksdossier en de samenvatting van de ingediende resultaten bij ClinicalTrials.gov. Studieverslagen en gerapporteerde resultaten worden beoordeeld door de National Library of Medicine (NLM) om er zeker van te zijn dat ze voldoen aan specifieke kwaliteitscontrolenormen voordat ze op de openbare website worden geplaatst.

Bestudeer belangrijke data

Studie start (Werkelijk)

21 april 2026

Primaire voltooiing (Geschat)

1 juni 2029

Studie voltooiing (Geschat)

1 september 2029

Studieregistratiedata

Eerst ingediend

18 maart 2026

Eerst ingediend dat voldeed aan de QC-criteria

18 maart 2026

Eerst geplaatst (Werkelijk)

24 maart 2026

Updates van studierecords

Laatste update geplaatst (Werkelijk)

25 juni 2026

Laatste update ingediend die voldeed aan QC-criteria

22 juni 2026

Laatst geverifieerd

1 juni 2026

Meer informatie

Termen gerelateerd aan deze studie

Andere studie-ID-nummers

  • HSC-MS-25-0782
  • 1U01DA064181-01 (Subsidie/contract van de Amerikaanse NIH)

Plan Individuele Deelnemersgegevens (IPD)

Bent u van plan om gegevens van individuele deelnemers (IPD) te delen?

NEE

Informatie over medicijnen en apparaten, studiedocumenten

Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel

Nee

Bestudeert een door de Amerikaanse FDA gereguleerd apparaatproduct

Ja

product vervaardigd in en geëxporteerd uit de V.S.

Nee

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