Research Library / Article Summary
Polydrug overdose mortality caused by synthetic opioids and stimulants: current sex- and age-specific trajectories in United States national data for 2018–2024
Plain-English AddictionTube research summary with source link, DOI, key finding, and recovery relevance.
Neuropsychopharmacology • 14 Nov 2025 • Research
opioidcocainemethamphetaminetreatment
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This article may help explain addiction science through research on opioid, cocaine, methamphetamine, treatment. The source abstract begins by describing: “Recent years have shown increases in overdose (OD) mortality caused by polydrug exposure to synthetic opioids such as fentanyl and stimulants such as methamphetamine or cocaine.”
Key finding: While this polydrug OD mortality has decreased in 2024, it remains at concerning levels.
Why this may help: This may help explain why addiction can involve brain, behavior, mental health, craving, relapse, or treatment factors rather than simple willpower alone. It should be read as research information, not personal medical advice.
This article may help explain addiction science through research on opioid, cocaine, methamphetamine, relapse. The source abstract begins by describing: “Social reinforcement-based treatments are effective for many, but not all, people with addictions to drugs.”
Key finding: This choice procedure can identify mechanisms of individual differences in an animal model of cocaine use and could thereby help screen medications for people who are relatively unresponsive to treatments based on rewarding social interaction.
Neuropsychopharmacology • 16 Aug 2021 • Research
opioidcocainemethamphetaminerelapsegeneticstreatment
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This article may help explain addiction science through research on opioid, cocaine, brain science, withdrawal. The source abstract begins by describing: “Persistent vulnerability to drug-seeking is driven by enduring synaptic adaptations, yet current μ-opioid receptor-targeting pharmacotherapies provide limited efficacy against these neuroadaptations.”
Key finding: By targeting a pathway independent of classical opioid receptor signaling, CA4 inhibition represents a mechanistically distinct strategy that may reduce relapse vulnerability in OUD.
Neuropsychopharmacology • 21 Jan 2026 • Research
opioidcocainebrain sciencewithdrawalrelapsetreatment
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This article may help explain addiction science through research on opioid, alcohol, cocaine, methamphetamine. The source abstract begins by describing: “Polysubstance use disorders ( ≥ 2 substance use disorders (SUDs)) are associated with high morbidity and mortality.”
Key finding: The elevated prevalence of polysubstance use disorders associated with early initiation of substance use underscores the critical need for evidence-based strategies to prevent alcohol, cannabis, and nicotine consumption before age 21.
Molecular Psychiatry • 29 Apr 2026 • Research
opioidalcoholcocainemethamphetaminecannabisnicotine
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This article may help explain addiction science through research on opioid, cocaine, methamphetamine, dopamine. The source abstract begins by describing: “Substance use disorder (SUD) represents a substantial challenge in neuropsychiatric medicine, with the molecular mechanisms underlying its etiology remaining elusive.”
Key finding: Our findings highlight the significant role of circHomer1 in regulating cocaine reward and identify a novel molecular regulator of the actions of cocaine on the brain’s reward circuitry, providing a new strategy for treating drug addiction.
Molecular Psychiatry • 08 Nov 2025 • Research
opioidcocainemethamphetaminedopaminebrain sciencegenetics
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This article may help explain addiction science through research on opioid, cocaine, methamphetamine, dopamine. The source abstract begins by describing: “Methamphetamine (METH) is a widely abused psychostimulant, whose hyper-rewarding property is believed to underlie its addictive effect, but the molecular mechanism regulating this effect remains unclear.”
Key finding: Our findings demonstrate an important role for NAc novel-m009C in regulating METH reward, reveal a novel molecular regulator of the actions of METH on brain reward circuitries and provide a new strategy for treating METH addiction based on the modulation of small non-coding RNAs.
Molecular Psychiatry • 17 Jun 2022 • Research
opioidcocainemethamphetaminedopaminebrain sciencegenetics
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