48 Participants Needed

Cariprazine for Cocaine and Opioid Use Disorder

MI
Overseen ByMegan Ivey, MS
Prior Safety DataThis treatment has passed at least one previous human trial
Approved in 1 JurisdictionThis treatment is already approved in other countries

Trial Summary

What is the purpose of this trial?

This trial tests if low-dose cariprazine can help reduce cocaine use in patients who are already being treated for opioid addiction. The medication may help balance brain chemicals that make people feel rewarded when they use drugs, potentially reducing their cravings.

Will I have to stop taking my current medications?

The trial does not specify if you need to stop taking your current medications, but you must continue taking BUP-NX (buprenorphine/naloxone) at a stable dose. You cannot take medications that interact with cariprazine or BUP-NX, and you should not be on psychoactive medications, except for occasional Benadryl for sleep.

What data supports the effectiveness of the drug Cariprazine for treating cocaine and opioid use disorder?

Cariprazine, a drug used for bipolar disorder and schizophrenia, was tested in squirrel monkeys for its potential to treat opioid dependence, but it did not show a significant change in drug preference. This suggests it may not be effective in altering opioid reward in non-dependent primates over a short period.12345

How is the drug Cariprazine unique for treating cocaine and opioid use disorder?

Cariprazine is unique because it is a dopamine D3-preferring partial agonist, which means it targets specific brain receptors that may help prevent relapse in substance use disorders. This mechanism is different from other treatments that do not specifically target these receptors.678910

Eligibility Criteria

Adults aged 18-65 with both cocaine and moderate to severe opioid use disorders, on stable doses of BUP-NX for at least a week, not pregnant or breastfeeding, able to understand English and provide informed consent. Excluded are those with certain mental health conditions, significant medical issues like severe kidney problems or liver damage, current high suicide risk, or taking conflicting medications.

Inclusion Criteria

I am not pregnant or breastfeeding, and I either cannot have children or use effective birth control.
An informed consent document understood, voluntarily signed and dated by the subject
Subject must provide a urine that is cocaine-negative and buprenorphine-positive on the day of enrollment
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Exclusion Criteria

Any pending legal action that could prohibit participation and/or compliance in study procedures
My anemia is not severe, staying below grade 2.
Significant medical or psychiatric symptoms or dementia which in the opinion of the investigators would preclude compliance with the protocol, adequate cooperation in the study, or obtaining informed consent
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Timeline

Screening

Participants are screened for eligibility to participate in the trial

1-2 weeks

Baseline

Includes baseline assessments, behavioral tasks/fNIRS session, and randomization

1-2 visits

Outpatient Treatment

Participants receive daily cariprazine (or placebo) and daily BUP-NX, with imaging and behavioral tasks at steady-state

8 weeks
2 visits per week

Follow-up

A follow-up visit to assess medical and psychological status

1 week

Treatment Details

Interventions

  • Cariprazine
  • Placebo
Trial OverviewThe study tests if low-dose cariprazine (1.5mg daily) affects cocaine use in patients already on BUP-NX. It's randomized and placebo-controlled; some participants will also undergo brain imaging (fMRI). Over approximately 11 weeks including screening and follow-up phases, urine and blood tests monitor drug compliance.
Participant Groups
2Treatment groups
Experimental Treatment
Placebo Group
Group I: CariprazineExperimental Treatment1 Intervention
Group II: PlaceboPlacebo Group1 Intervention

Cariprazine is already approved in United States for the following indications:

🇺🇸
Approved in United States as Vraylar for:
  • Schizophrenia
  • Acute manic or mixed episodes associated with bipolar I disorder
  • Depressive episodes associated with bipolar I disorder (bipolar depression)
  • Adjunctive treatment with an antidepressant therapy (ADT) for major depressive disorder (MDD)

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Who Is Running the Clinical Trial?

Kyle Kampman

Lead Sponsor

Trials
4
Recruited
480+

National Institute on Drug Abuse (NIDA)

Collaborator

Trials
2,658
Recruited
3,409,000+

Findings from Research

This review highlights that certain drugs, including L-type calcium channel blockers (isradipine and nifedipine) and serotonin-3 receptor antagonists (MDL72222 and ICS205-930), can effectively block the positive place preference induced by cocaine in rats, suggesting their potential in treating cocaine addiction.
Additionally, the study discusses the blockade of other cocaine-related behaviors by these drugs, indicating their broader implications for understanding cocaine's effects and developing effective treatment strategies for addiction.
Blockade of cocaine-induced conditioned place preference: relevance to cocaine abuse therapeutics.Calcagnetti, DJ., Keck, BJ., Quatrella, LA., et al.[2019]
In a 12-week clinical trial involving 94 patients, both amantadine and desipramine showed initial reductions in reported cocaine abuse compared to placebo, but this effect diminished by week 8, indicating limited long-term efficacy.
Despite good treatment retention and compliance, there were no significant differences in cocaine-free urine samples between the medicated groups and placebo, suggesting that these medications may not effectively sustain abstinence in cocaine-abusing methadone-maintained patients.
Pharmacotherapy for cocaine-abusing methadone-maintained patients using amantadine or desipramine.Kosten, TR., Morgan, CM., Falcione, J., et al.[2019]
Buprenorphine significantly reduced the preference for remifentanil in squirrel monkeys, indicating its potential effectiveness in decreasing opioid use during the five-day treatment evaluation.
Cariprazine and methadone did not show a significant impact on drug preference, suggesting that cariprazine may not alter opioid reward in non-dependent primates.
Effects of buprenorphine, methadone, and cariprazine on economic choice between remifentanil and food in squirrel monkeys.Amirali, AS., Hecker, JC., Figueroa, HM., et al.[2023]

References

Blockade of cocaine-induced conditioned place preference: relevance to cocaine abuse therapeutics. [2019]
Pharmacotherapy for cocaine-abusing methadone-maintained patients using amantadine or desipramine. [2019]
Effects of buprenorphine, methadone, and cariprazine on economic choice between remifentanil and food in squirrel monkeys. [2023]
Buprenorphine for cocaine and opiate dependence. [2013]
Opioidergic modulation of cocaine conditioned place preferences. [2019]
Cariprazine: First Global Approval. [2018]
Cariprazine (RGH-188), a D₃-preferring dopamine D₃/D₂ receptor partial agonist antipsychotic candidate demonstrates anti-abuse potential in rats. [2021]
Cariprazine for the Treatment of Schizophrenia: A Review of this Dopamine D3-Preferring D3/D2 Receptor Partial Agonist. [2016]
Cariprazine: A Review in Schizophrenia. [2018]
Cariprazine:New dopamine biased agonist for neuropsychiatric disorders. [2017]