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Iain S. Mcgregor

10 papers in the library · 378 citations · publishing 2005-2025

Papers

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Psychedelic use in individuals living with eating disorders or disordered eating: findings from the international MED-FED survey.

Journal of Eating Disorders July 24, 2025 Sarah-Catherine Rodan, Noah Meez, Sophie Lloyd-Hurwitz et al. 2 citations

There are few effective treatments for eating disorders (EDs), and new interventions are urgently needed. The MEDication and other drugs For Eating Disorders ("MED-FED") survey investigated the lived experience of adults with EDs regarding their prescription and non-prescription drugs use. Psychedelic drugs were highly rated in this survey for their impact on ED symptoms and general mental...

Prescription and Nonprescription Drug Use Among People With Eating Disorders.

JAMA Network Open July 1, 2025 Sarah-Catherine Rodan, Sarah Maguire, Noah Meez et al. 5 citations

There are few effective pharmacotherapies for treating eating disorders (EDs). High rates of substance use among individuals with EDs suggest potential self-medication of symptoms. To explore the experiences of individuals with EDs regarding use of prescribed and nonprescribed drugs. This survey study assessed responses to the Medications and Other Drugs for Eating Disorders (MED-FED) survey,...

Cannabis containing equivalent concentrations of delta-9-tetrahydrocannabinol (THC) and cannabidiol (CBD) induces less state anxiety than THC-dominant cannabis

Psychopharmacology October 13, 2022 Nadia R. P. W. Hutten, Thomas R. Arkell, Frederick Vinckenbosch et al. 36 citations

RATIONALE: Delta-9-tetrahydrocannabinol (THC), an active component of cannabis, can cause anxiety in some users during intoxication. Cannabidiol (CBD), another constituent of cannabis, has anxiolytic properties suggesting that cannabis products containing CBD in addition to THC may produce less anxiety than THC-only products. Findings to date around this issue have been inconclusive and could...

Sex differences in acute cannabis effects revisited: Results from two randomized, controlled trials

Addiction Biology December 22, 2021 Thomas R. Arkell, Richard C. Kevin, Frederick Vinckenbosch et al. 45 citations

Some evidence suggests that males and females may differ in their responses to acute cannabis effects, including subjective drug effects and behavioural effects, and cannabinoid pharmacokinetics. This is significant given current changes to cannabis-related policies and, in consequence, increased cannabis accessibility. The present study combines data from two randomized controlled trials to...

Psilocybin as a Novel Pharmacotherapy for Treatment-Refractory Anorexia Nervosa

OBM Neurobiology June 24, 2021 Sarah-Catherine Rodan, Phillip Aouad, Iain S. Mcgregor et al. 10 citations

Anorexia Nervosa (AN) is a major health problem with one of the highest mortalities and treatment costs of any psychiatric condition. Cognitive behavioural therapy (CBT) is currently the most widely used treatment for AN in adults but provides remission rates ≤ 50%. Treatment drop-out is exceedingly high and those that persevere with treatment often relapse, causing increased risk of morbidity...

Cannabidiol (CBD) content in vaporized cannabis does not prevent tetrahydrocannabinol (THC)-induced impairment of driving and cognition

Psychopharmacology May 1, 2019 Thomas R. Arkell, Nicholas Lintzeris, Richard C. Kevin et al. 177 citations

BACKGROUND: The main psychoactive component of cannabis, delta-9-tetrahydrocannabinol (THC), can impair driving performance. Cannabidiol (CBD), a non-intoxicating cannabis component, is thought to mitigate certain adverse effects of THC. It is possible then that cannabis containing equivalent CBD and THC will differentially affect driving and cognition relative to THC-dominant cannabis. AIMS:...

Cannabidiol potentiates Δ⁹-tetrahydrocannabinol (THC) behavioural effects and alters THC pharmacokinetics during acute and chronic treatment in adolescent rats.

Psychopharmacology November 2011 Charlotte Klein, Emily Karanges, Adena Spiro et al.

The interactions between Δ(9)-tetrahydrocannabinol (THC) and cannabidiol (CBD) during chronic treatment, and at equivalent doses, are not well characterised in animal models. The aim of this study is to examine whether the behavioural effects of THC, and blood and brain THC levels are affected by pre-treatment with equivalent CBD doses. Adolescent rats were treated with ascending daily THC...

Neural correlates of MDMA (“Ecstasy”)-induced social interaction in rats

Social Neuroscience June 21, 2008 Murray R. Thompson, Glenn E. Hunt, Iain S. Mcgregor 48 citations

The popular drug 3,4 methylenedioxymethamphetamine (MDMA, "Ecstasy", "the Love Drug") produces feelings of love and closeness in humans and induces analogous prosocial and antiaggressive effects in laboratory animals. Here we examined the specific brain regions that may be involved in these prosocial effects. Male Wistar rats were pretreated with a moderate dose of MDMA (5 mg/kg) or vehicle and...

MDMA, methamphetamine and their combination: possible lessons for party drug users from recent preclinical research

Drug and Alcohol Review 2007 Kelly J. Clemens, Iain S. Mcgregor, Glenn E. Hunt et al. 55 citations

Abstract The substituted amphetamines 3,4‐methylenedioxymethamphetamine (MDMA, ‘Ecstasy’) and methamphetamine (METH, ‘ice’, ‘speed’) are increasingly popular drugs amongst party‐drug users. Studies with humans have investigated the acute and possible long‐term adverse effects of these drugs, yet outcomes of such studies are often ambiguous due to a variety of confounding factors. Studies...

Co-administration of THC and MDMA ('ecstasy') synergistically disrupts memory in rats.

Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology August 2005 June M Young, Iain S McGregor, Paul E Mallet

3,4-Methylenedioxymethamphetamine (MDMA, 'Ecstasy') and cannabis are two of the most commonly used illicit drugs in the western world, and are often used in combination. Very little research has examined their effect on cognitive function or behavior when combined, The present study used a double Y-maze task to examine the acute effect of MDMA and delta9-tetrahydrocannabinol (THC, the principal...