The Role of Cannabidiol (CBD) in Addiction Inhibition: Mechanisms, Therapeutic Potential, and Implications for Substance Use Disorders

Title: The Role of Cannabidiol (CBD) in Addiction Inhibition: Mechanisms, Therapeutic Potential, and Implications for Substance Use Disorders Creators: Hallelujah, Paul (University of Toronto & Queen's University Alumnus) Publication Date: 2026-02-10 Description: Addiction, or substance use disorder (SUD), remains a critical public health challenge characterized by chronic relapse, compulsive drug-seeking, and limited therapeutic options. This comprehensive review examines the neurobiological mechanisms and therapeutic potential of Cannabidiol (CBD)—a non-intoxicating phytocannabinoid derived from Cannabis sativa—as a broad-spectrum intervention for addiction inhibition. Unlike Delta-9-tetrahydrocannabinol (THC), CBD lacks abuse liability and exerts a "multi-target" pharmacological profile that modulates several key neural pathways implicated in addiction. This paper synthesizes preclinical and clinical evidence across a wide spectrum of addictive disorders, including: Opioid Use Disorder (OUD): Mechanisms of cue-induced craving reduction and alleviation of withdrawal anxiety. Alcohol Use Disorder (AUD): CBD's role in neuroprotection, reduction of voluntary intake, and prevention of stress-induced relapse. Psychostimulant Addiction: Efficacy in accelerating the extinction of cocaine and methamphetamine reward memories. Nicotine and Cannabis Dependence: Potential for reducing consumption and managing withdrawal symptoms. Food Addiction: Modulation of the endocannabinoid system to suppress compulsive eating behaviors. Key Mechanisms Explored: The review provides a deep dive into the molecular and circuit-level actions of CBD, including: Dopaminergic Regulation: Attenuation of drug-induced dopamine surges in the mesolimbic reward pathway. Endocannabinoid System (ECS) Reset: Inhibition of FAAH and negative allosteric modulation of CB1 receptors to restore homeostatic signaling. Serotonergic Signaling: Activation of 5-HT1A receptors to mediate anxiolytic effects and reduce stress-reactivity. Glutamatergic Plasticity: Normalization of AMPA receptor expression (GluR1) and prevention of excitotoxicity. Neurogenesis: Promotion of hippocampal neurogenesis and BDNF expression, critical for cognitive flexibility and extinction learning. This work positions CBD not merely as a symptom-management tool, but as a holistic neurobiological intervention capable of recalibrating the addicted brain's reward, stress, and executive control circuits. Keywords: Cannabidiol, CBD, Substance Use Disorder, Addiction, Opioid Use Disorder, Alcohol Use Disorder, Nicotine Addiction, Psychostimulants, Neurogenesis, Endocannabinoid System, 5-HT1A receptor, Dopamine, Relapse Prevention, Neuroscience, Pharmacology Language: English License: Creative Commons Attribution 4.0 International