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Natalie J. Medlicott

8 papers in the library · 189 citations · publishing 2017-2025

Papers

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Ketamine for treatment-resistant post-traumatic stress disorder: double-blind active-controlled randomised crossover study

BJPsych Open October 1, 2025 Ben Beaglehole, Paul Glue, Shona Neehoff et al. 5 citations

We provide preliminary support for the efficacy and tolerability of i.m. ketamine in a community sample of individuals with PTSD. Further work is required to establish the optimal dosing regimen and longer-term role of ketamine in treatment of PTSD, but our findings are encouraging given the well-known of treatments in this area.

Effects of ketamine in patients with treatment-refractory generalized anxiety and social anxiety disorders: Exploratory double-blind psychoactive-controlled replication study

Journal of Psychopharmacology March 1, 2020 Paul Glue, Shona Neehoff, A. Sabadel et al. 97 citations

Background: We previously reported that ketamine has anxiolytic effects in patients with treatment-resistant generalized anxiety and social anxiety disorders. Aims: The purpose of this study was to replicate our earlier report about ketamine‘s anxiolytic activity, using a more robust study design. Methods: This was a double-blind, psychoactive-controlled ascending dose study in 12 patients with...

Ascending‐Dose Study of Controlled‐Release Ketamine Tablets in Healthy Volunteers: Pharmacokinetics, Pharmacodynamics, Safety, and Tolerability

The Journal of Clinical Pharmacology February 17, 2020 Paul Glue, Natalie J. Medlicott, Peter Surman et al. 44 citations

Parenteral ketamine has fast‐onset antidepressant and antianxiety effects; however, it causes dissociation, hypertension, and tachycardia shortly after dosing. Ketamine's antidepressant effects may be due to active metabolites rather than to ketamine itself. We hypothesized that oral controlled‐release ketamine tablets would improve safety and tolerability compared with injected ketamine by...

Safety and efficacy of extended release ketamine tablets in patients with treatment-resistant depression and anxiety: open label pilot study

Therapeutic Advances in Psychopharmacology 2020 Paul Glue, Natalie J. Medlicott, Shona Neehoff et al. 43 citations

Background: Ketamine’s defining side effects are dissociation and increased blood pressure/heart rate. An oral formulation with delayed absorption could minimize these effects. We recently reported safety and tolerability data for an extended release ketamine tablet in healthy volunteers. Methods: To assess safety, tolerability, efficacy, and pharmacokinetics of an extended release oral...

The effect of route of administration on the enantioselective pharmacokinetics of ketamine and norketamine in rats.

Journal of Psychopharmacology October 2018 Martin Le Nedelec, Paul Glue, Helen Winter et al.

Ketamine has been shown to produce a rapid and potent antidepressant response in patients with treatment-resistant depression. Currently ketamine is most commonly administered as a 40-minute intravenous infusion, though it is unknown whether this is the optimal route of administration. To determine the plasma concentration time course of the R- and S-enantiomers of ketamine and norketamine...

Acute low-dose ketamine produces a rapid and robust increase in plasma BDNF without altering brain BDNF concentrations.

Drug delivery and translational research June 2018 Martin Le Nedelec, Paul Glue, Helen Winter et al.

Peripheral BDNF changes after ketamine administration have been proposed as a biomarker for brain BDNF changes. However, published data are conflicting and come from studies in paired animal groups. This study determined the time course of plasma BDNF concentrations following the administration of a single 10 mg/kg dose of ketamine by different routes of administration in rats. Brain BDNF...

Safety and efficacy of maintenance ketamine treatment in patients with treatment-refractory generalised anxiety and social anxiety disorders.

Journal of Psychopharmacology June 2018 Paul Glue, Shona Neehoff, Natalie J. Medlicott et al.

In this maintenance treatment study, we sought to evaluate the effect on anxiety ratings, safety and tolerability of 3 months of weekly ketamine in 20 patients with treatment-refractory DSM IV generalised anxiety disorder (GAD) and/or social anxiety disorder (SAD), and subsequent assessment of remission post-treatment. This was an uncontrolled open-label study in 20 patients who had been...

DOI: 10.1177/0269881118762073 (opens in new tab) Full text (opens in new tab) Ketamine Generalised anxiety disorder Maintenance treatment Social anxiety disorder

Ketamine's dose-related effects on anxiety symptoms in patients with treatment refractory anxiety disorders.

Journal of Psychopharmacology October 2017 Paul Glue, Natalie J. Medlicott, Sarah Harland et al.

The N-methyl-D-aspartate receptor antagonist ketamine has rapid onset activity in treatment-resistant depression, post-traumatic stress disorder and obsessive compulsive disorder. Due to similarities in brain network activity in depression and anxiety disorders, we hypothesized that ketamine might also be active in other refractory anxiety disorders. We evaluated the efficacy and safety of...