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Luke A. Downey

14 papers in the library · 338 citations · publishing 2012-2024

Papers

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A randomised, placebo-controlled, double blind, crossover trial on the effect of a 20:1 cannabidiol: Δ9-tetrahydrocannabinol medical cannabis product on neurocognition, attention, and mood.

European Neuropsychopharmacology May 2024 Brooke Manning, Amie C Hayley, Sarah J Catchlove et al.

As cannabinoid-based medications gain popularity in the treatment of refractory medical conditions, it is crucial to examine the neurocognitive effects of commonly prescribed products to ensure associated safety profiles. The present study aims to investigate the acute effects of a standard 1 mL sublingual dose of CannEpil®, a medicinal cannabis oil containing 100 mg cannabidiol (CBD) and 5 mg...

Producing Altered States of Consciousness, Reducing Substance Misuse: A Review of Psychedelic-Assisted Psychotherapy, Transcendental Meditation and Hypnotherapy

Psychoactives March 25, 2024 Agnieszka D. Sekula, Prashanth Puspanathan, Luke A. Downey et al. 1 citation

A set of interventions that can produce altered states of consciousness (ASC) have shown utility in the treatment of substance misuse. In this review, we examine addiction-related outcomes associated with three common interventions that produce ASCs: psychedelic-assisted psychotherapy (PP), Transcendental Meditation (TM) and hypnotherapy (HT). While procedurally distinct, all three...

DOI: 10.3390/psychoactives3020010 (opens in new tab) Addiction Mindfulness Psychotherapist Psychological intervention +5

Cannabinoid treatments for anxiety: A systematic review and consideration of the impact of sleep disturbance.

Neuroscience & Biobehavioral Reviews December 2022 Andrea J Narayan, Luke A. Downey, Brooke Manning et al.

Cannabidiol's (CBD) safety profile and broad action has made it a popular treatment option for anxiety and co-occurring sleep disturbance. However, its efficacy in healthy and clinical populations, treatment duration, formulation and doses for optimal therapeutic benefits remains unclear. Selected databases were examined from inception to October 2022. Study selection, data extraction and...

Default Mode Network Modulation by Psychedelics: A Systematic Review

The International Journal of Neuropsychopharmacology October 21, 2022 James J Gattuso, Daniel Perkins, Simon Ruffell et al. 233 citations

Abstract Psychedelics are a unique class of drug that commonly produce vivid hallucinations as well as profound psychological and mystical experiences. A grouping of interconnected brain regions characterized by increased temporal coherence at rest have been termed the Default Mode Network (DMN). The DMN has been the focus of numerous studies assessing its role in self-referencing, mind...

Virtual Reality as a Moderator of Psychedelic-Assisted Psychotherapy

Frontiers in Psychology March 4, 2022 Agnieszka D. Sekula, Luke A. Downey, Prashanth Puspanathan 27 citations

Psychotherapy with the use of psychedelic substances, including psilocybin, lysergic acid diethylamide (LSD), ketamine, and 3,4-methylenedioxymethamphetamine (MDMA), has demonstrated promise in treatment of post-traumatic stress disorder (PTSD), anxiety, addiction, and treatment-resistant depression. Psychedelic-assisted psychotherapy (PP) represents a unique psychopharmacological model that...

Legalization of Psychedelic Substances

JAMA December 21, 2021 Luke A. Downey, Jerome Sarris, Daniel Perkins 8 citations

Our website uses cookies to enhance your experience. By continuing to use our site, or clicking "Continue," you are agreeing to our Cookie Policy | Continue JAMA HomeNew OnlineCurrent IssueFor Authors Publications JAMA JAMA Network Open JAMA Cardiology JAMA Dermatology JAMA Health Forum JAMA Internal Medicine JAMA Neurology JAMA Oncology JAMA Ophthalmology JAMA Otolaryngology–Head & Neck...

DOI: 10.1001/jama.2021.19372 (opens in new tab) Family medicine Otorhinolaryngology

Does Emotional Intelligence Mediate the Relation Between Mindfulness and Anxiety and Depression in Adolescents?

Frontiers in Psychology December 12, 2018 Brigid Foster, Justine Lomas, Luke A. Downey et al.

High anxiety and depression are often observed in the Australian adolescent population, and if left untreated, can have long-term negative consequences impacting educational attainment and a range of important life outcomes. The utilization of mindfulness techniques has been associated with decreased anxiety and depression, but the underlying mechanisms for this is only beginning to be...

The acute and residual effects of escalating, analgesic-range doses of ketamine on driving performance: A simulator study.

Progress in Neuro-Psychopharmacology and Biological Psychiatry August 30, 2018 Amie C Hayley, Maja Green, Luke A. Downey et al.

Ketamine hydrochloride elicits potent psychotomimetic and neurobehavioural effects which make it incompatible with driving; however, the direct effect on driving performance is yet to be assessed. Using an open label, within-subjects protocol, 15 males and 5 females (mean age = 30.8 years) were administered three fixed, stepwise increasing sub-anaesthetic doses of intravenous (IV) ketamine...

Recreational 3,4-methylenedioxymethamphetamine or 'ecstasy': Current perspective and future research prospects.

Journal of Psychopharmacology August 2017 Andrew C. Parrott, Luke A. Downey, Carl A Roberts et al.

The purpose of this article is to debate current understandings about the psychobiological effects of recreational 3,4-methylenedioxymethamphetamine (MDMA or 'ecstasy'), and recommend theoretically-driven topics for future research. Recent empirical findings, especially those from novel topic areas were reviewed. Potential causes for the high variance often found in group findings were also...

DOI: 10.1177/0269881117711922 (opens in new tab) Full text (opens in new tab) Ecstasy 3,4-methylenedioxymethamphetamine Central nervous system Cognition +3

MDMA, cortisol, and heightened stress in recreational ecstasy users

Behavioural Pharmacology July 11, 2014 A. C. Parrott, Catharine Montgomery, Mark Wetherell et al. 34 citations

Stress develops when an organism requires additional metabolic resources to cope with demanding situations. This review will debate how recreational 3,4-methylenedioxymethamphetamine (MDMA, 'ecstasy') can increase some aspects of acute and chronic stress in humans. Laboratory studies on the acute effects of MDMA on cortisol release and neurohormone levels in drug-free regular ecstasy/MDMA users...

Altered energy production, lowered antioxidant potential, and inflammatory processes mediate CNS damage associated with abuse of the psychostimulants MDMA and methamphetamine.

European Journal of Pharmacology March 15, 2014 Luke A. Downey, Jennifer M Loftis

Central nervous system (CNS) damage associated with psychostimulant dependence may be an ongoing, degenerative process with adverse effects on neuropsychiatric function. However, the molecular mechanisms regarding how altered energy regulation affects immune response in the context of substance use disorders are not fully understood. This review summarizes the current evidence regarding the...

DOI: 10.1016/j.ejphar.2014.01.032 (opens in new tab) Full text (opens in new tab) 2-fluoro-2-deoxy-d-glucose pubchem cid 3,4-Methylenedioxy-N-Methylamphetamine MDMA Bioenergetics Cocaine pubchem cid +4

Increased cortisol levels in hair of recent Ecstasy/MDMA users.

European Neuropsychopharmacology March 1, 2014 Andrew C. Parrott, H. Sands, Lewis Jones et al. 35 citations

Previous research has revealed an acute 8-fold increase in salivary cortisol following self-administrated Ecstasy/MDMA in dance clubbers. It is currently not known to what extent repeated usage impacts upon activity of the hypothalamic-pituitary-adrenal axis over a more prolonged period of time. This study investigated the integrated cortisol levels in 3-month hair samples from recent...

The acute effects of 3,4-methylenedioxymethamphetamine and d-methamphetamine on human cognitive functioning.

Psychopharmacology April 2012 Con Stough, Rebecca King, Katherine Papafotiou et al.

This study investigated the acute (3-h) and 24-h post-dose cognitive effects of oral 3,4-methylenedioxymethamphetamine (MDMA), d-methamphetamine, and placebo in a within-subject double-blind laboratory-based study in order to compare the effect of these two commonly used illicit drugs on a large number of recreational drug users. Sixty-one abstinent recreational users of illicit drugs comprised...

The acute effects of 3,4-methylenedioxymethamphetamine and methamphetamine on driving: a simulator study.

Accident; Analysis and Prevention March 2012 Con Stough, Luke A. Downey, Rebecca King et al.

Illicit drugs such as MDMA and methamphetamine are commonly abused drugs that have also been observed to be prevalent in drivers injured in road accidents. Their exact effect on driving and driving behavior has yet to be thoroughly investigated. Sixty-one abstinent recreational users of illicit drugs comprised the participant sample, with 33 females and 28 males, mean age 25.45 years. The three...