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Ketamine anxiety

Rachel R Horsley, Tomáš Páleníček, Jan Kolin, Karel Valeš
Short-term moderate doses of serotonergic and dissociative hallucinogens can be useful in the treatment of anxiety. Recently, a trend has developed for long-term intermittent 'microdosing' (usually one-tenth of a 'full' active dose), with reports of long-lasting relief from anxiety and related disorders; however, there is no scientific evidence for the efficacy of therapeutic microdosing nor to show its lasting effects. The objective of this study was to test for lasting effects on anxiety in rats after microdosing with ketamine or psilocin...
March 13, 2018: Behavioural Pharmacology
Andréa T Faccio, Francisco J Ruperez, Nagendra S Singh, Santiago Angulo, Marina F M Tavares, Michel Bernier, Coral Barbas, Irving W Wainer
BACKGROUND: Impairment in mitochondrial biogenesis and function plays a key role in depression and anxiety, both of which being associated with changes in fatty acid and phospholipid metabolism. The antidepressant effects of (R,S)-ketamine have been linked to its conversion into (2S,6S;2R,6R)-hydroxynorketamine (HNK); however, the connection between structure and stereochemistry of ketamine and HNK in the mitochondrial homeostatic response has not yet been fully elucidated at a metabolic level...
March 8, 2018: Biochimica et Biophysica Acta
S D Dolzani, M V Baratta, J M Moss, N L Leslie, S G Tilden, A T Sørensen, L R Watkins, Y Lin, S F Maier
Stress is a potent etiological factor in the onset of major depressive disorder and posttraumatic stress disorder (PTSD). Therefore, significant efforts have been made to identify factors that produce resilience to the outcomes of a later stressor, in hopes of preventing untoward clinical outcomes. The NMDA receptor antagonist ketamine has recently emerged as a prophylactic capable of preventing neurochemical and behavioral outcomes of a future stressor. Despite promising results of preclinical studies performed in male rats, the effects of proactive ketamine in female rats remains unknown...
January 2018: ENeuro
Daiane B Fraga, Gislaine Olescowicz, Morgana Moretti, Aline Siteneski, Mauren K Tavares, Dayane Azevedo, André R S Colla, Ana Lúcia S Rodrigues
Some studies have demonstrated that ascorbic acid, similarly to ketamine, exhibits antidepressant-like effects mediated, at least in part, by modulation of the glutamatergic system. Despite the involvement of glutamatergic system in the pathophysiology of anxiety disorders, the ability of ascorbic acid and ketamine to elicit anxiolytic effects in animal models remains to be established. Therefore, this study investigated the effects of a single administration of ascorbic acid, ketamine or diazepam (positive control) in different animal models of anxiety...
February 13, 2018: Journal of Psychiatric Research
C Fantacci, G C Fabrizio, P Ferrara, F Franceschi, A Chiaretti
OBJECTIVE: Pain relief is a very important aspect in Pediatrician's clinical practice. It is often thought that young children, particularly infants, do not perceive as much pain as adults because of their immature nervous system and that untreated pain would not have adverse long-term consequences. Instead, it has been demonstrated that infants and children experience pain in a similar manner to adults. Many factors, particularly emotional factors, can increase the child's pain perception...
January 2018: European Review for Medical and Pharmacological Sciences
Ira Byock
BACKGROUND: Psychiatric research in the 1950s and 1960s showed potential for psychedelic medications to markedly alleviate depression and suffering associated with terminal illness. More recent published studies have demonstrated the safety and efficacy of psilocybin, MDMA, and ketamine when administered in a medically supervised and monitored approach. A single or brief series of sessions often results in substantial and sustained improvement among people with treatment-resistant depression and anxiety, including those with serious medical conditions...
January 22, 2018: Journal of Palliative Medicine
Elena Martín-González, Ángeles Prados-Pardo, Santiago Mora, Pilar Flores, Margarita Moreno
RATIONALE: Clinical studies have shown that some psychoactive recreational drugs have therapeutic applications in anxiety, depression, and schizophrenia. However, to date, there are few studies on the therapeutic potential efficacy of recreational drugs in compulsive neuropsychiatric disorders. OBJECTIVES: We explored the therapeutic potential of different psychoactive and psychedelic drugs in a preclinical model of compulsive behavior. METHODS: Outbred male Wistar rats were selected as either high (HD) or low (LD) drinkers according to their behavior in schedule-induced polydipsia (SIP)...
January 8, 2018: Psychopharmacology
Q B Lou, K Nan, F F Xiang, X Z Chen, W S Zhu, X T Zhang, J Li
Objective: To investigate the effects of multi-day low dose ketamine infusion for postmastectomy pain syndrome (PMPS) after breast cancer surgery. Methods: This study was a prospective randomized controlled trial. From June 2015 to May 2016 in Affiliated Yiwu Hospital of Wenzhou Medical University, 66 patients with breast cancer surgery were randomly divided into control group (group C) and ketamine group (group K). Patients in group K were infused with 0.5 mg/kg of ketamine mixed in 250 ml of 0.9% normal saline in 1 h daily for 7 days...
December 12, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
Fay A Guarraci, Chantal M F Gonzalez, Devon Lucero, Paige D Womble, Heba Abdel-Rahim, Jennie DeVore, Marcela Nicole Kunkel, Emma Quadlander, Morgan Stinnett, Jessica Boyette-Davis
The present study characterized the effects of ketamine on sexual behavior and anxiety in female rats. In Experiment 1, female subjects received an injection of ketamine (10.0mg/kg) or saline 30min prior to a sexual partner-preference test during which each female subject was given the opportunity to interact with a female stimulus or a sexually vigorous male stimulus. Immediately afterwards, female subjects were tested for locomotion in an open field test. Ketamine-treated subjects spent significantly more time with the male stimulus than saline-treated subjects...
December 19, 2017: Pharmacology, Biochemistry, and Behavior
Hui Qiao, Zhi Xie, Jie Jia
BACKGROUND: Preoperative anxiety is common in pediatric patients. When dexmedetomidine is used alone for sedation as premedication, children tend to awaken when separated from their parents, and body movements occur during invasive procedures. We tested the hypothesis that the combination of dexmedetomidine and ketamine may be a useful premedication to alleviate preoperative anxiety and improve cooperation during intravenous cannulation in pediatric patients, while producing minimal adverse events...
November 29, 2017: BMC Anesthesiology
W Yan, J-F Liu, Y Han, W Zhang, Y-X Luo, Y-X Xue, W-L Zhu, C Yang, W-H Chen, H-L Guo, Y-N Ma, K Yuan, J-S Wang, J Shi, L Lu
Neuronal atrophy and alterations of synaptic structure and function in the medial prefrontal cortex (mPFC) have been implicated in the pathogenesis of depression, but the underlying molecular mechanisms are largely unknown. The protein kinase Mζ (PKMζ), a brain-specific atypical protein kinase C isoform, is important for maintaining long-term potentiation and storing memory. In the present study, we explored the role of PKMζ in mPFC in two rat models of depression, chronic unpredictable stress (CUS) and learned helplessness...
November 28, 2017: Molecular Psychiatry
Carlos M Coronel-Oliveros, Renny Pacheco-Calderón
Schizophrenia is a complex neuropsychiatric disorder characterized by hallucinations, delusions, anhedonia, flat affect and cognitive impairments. The aim of this study was to propose a prenatal treatment with ketamine, a psychedelic drug that acts as a non-competitive inhibitor of glutamate NMDA receptors, as a neurodevelopmental animal model of schizophrenia. The drug was applied (i.m. 60  h-1 ) in pregnant Sprague-Dawley rats on gestational Day 14. Offspring behavior was studied on pubertal (4 weeks old) and adult (10 weeks old) stages...
January 2018: Developmental Psychobiology
Jane Ashbrook, Nikos Rodgdakis, Peter Goodwin, Gill Yeowell, Michael Callaghan
STUDY OBJECTIVE: There is no consensus on the management of low back pain in the ED and evidence suggests that these patients are likely to receive unwarranted imaging and inappropriate opioid prescription.The purpose of this study is to review the available literature pertaining to the clinical management of acute low back pain in the ED. METHODS: The Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) and Realist And Meta-narrative Evidence Syntheses: Evolving Standards (RAMESES) guidelines were observed during this review...
December 2017: Emergency Medicine Journal: EMJ
M Amin Khan, David R Houck, Amanda L Gross, Xiao-Lei Zhang, Cassia Cearley, Torsten M Madsen, Roger A Kroes, Patric K Stanton, Jeffrey Burgdorf, Joseph R Moskal
Background: N-methyl-D-aspartate receptors (NMDAR) are one member of a family of ionotropic glutamate receptors that play a pivotal role in synaptic plasticity processes associated with learning and have become attractive therapeutic targets for diseases such as depression, anxiety, schizophrenia, and neuropathic pain. NYX-2925 ((2S, 3R)-3-hydroxy-2-((R)-5-isobutyryl-1-oxo-2,5-diazaspiro[3.4]octan-2-yl)butanamide) is one member of a spiro--lactam-based chemical platform that mimics some of the dipyrrolidine structural features of rapastinel (formerly GLYX-13: threonine-proline-proline-threonine) and is distinct from known NMDAR agonists or antagonists such as D-cycloserine, ketamine, MK-801, kynurenic acid or ifenprodil...
November 1, 2017: International Journal of Neuropsychopharmacology
Tony Zitek, Melanie Gates, Christopher Pitotti, Alexandria Bartlett, Jayme Patel, Aryan Rahbar, Wesley Forred, Joseph S Sontgerath, Jill M Clark
STUDY OBJECTIVE: Intravenous subdissociative-dose ketamine has been shown to be effective for pain management, but has not been specifically studied for headaches in the emergency department (ED). For this reason, we designed a study to compare standard treatment (prochlorperazine) with ketamine in patients with benign headaches in the ED. METHODS: This study was a multicenter, double-blind, randomized, controlled trial with a convenience sample of patients presenting to the ED with benign headaches...
October 13, 2017: Annals of Emergency Medicine
Xue-Bing Liu, Yao Zhang, Xu-Yi Wang, Wei Hao
The use of amphetamine-type stimulants (ATS) and ketamine is of particular clinical concern because of its associated psychotic symptoms. In Chinese clinical practice, ATS and ketamine are commonly used simultaneously, but very few studies have reported the symptom profile of users who use both drugs. This study determined whether the combined use of ATS and ketamine is associated with more psychotic symptoms than either ATS or ketamine alone. According to drug use characteristics, 375 Chinese synthetic drug users were categorized into 2 pairs of comparison groups: ATS-only (n=125) vs...
September 12, 2017: Oncotarget
Jean I Pearce, David C Brousseau, Ke Yan, Keri R Hainsworth, Raymond G Hoffmann, Amy L Drendel
OBJECTIVE: The purpose of this study was to determine the proportion of children undergoing procedural sedation for fracture reduction in the emergency department (ED) observed to experience negative postdischarge behaviors. Predictors of negative behaviors were evaluated, including anxiety. METHODS: This was a prospective cohort study of children receiving intravenous ketamine sedation for ED fracture reduction. The child's anxiety prior to sedation was measured with the Modified Yale Preoperative Anxiety Scale...
October 9, 2017: Academic Emergency Medicine: Official Journal of the Society for Academic Emergency Medicine
Stephanie Wössner, Kirsten Weber, Anna C Steinbeck, Markus Oberhauser, Matthias Feuerecker
BACKGROUND AND PURPOSE: The purpose of this case report is to describe a multimodal pain therapeutic concept including the adjunct use of pregabalin in a 4.5 year-old child after forefoot amputation. Phantom limb pain and sensation is a complex pain syndrome that is difficult to treat and prevent. 70-75% of all children develop such a pain syndrome after amputation. We describe here a paediatric patient who underwent forefoot amputation following traumatic foot injury and received multimodal pain therapy including pregabalin...
October 2017: Scandinavian Journal of Pain
Aditya Kumar Kejriwal, Shaheen Begum, Gopal Krishan, Richa Agrawal
Laparoscopic surgery is normally performed under general anesthesia, but regional techniques like thoracic epidural and lumbar spinal have been emerging and found beneficial. We performed a clinical case study of segmental thoracic spinal anaesthesia in a healthy patient. We selected an ASA grade I patient undergoing elective laparoscopic cholecystectomy and gave spinal anesthetic in T10-11 interspace using 1 ml of bupivacaine 5 mg ml-1 mixed with 0.5 ml of fentanyl 50 μg ml-1 . Other drugs were only given (systemically) to manage patient anxiety, pain, nausea, hypotension, or pruritus during or after surgery...
July 2017: Anesthesia, Essays and Researches
Cameron Castle, Andrew Gray, Shona Neehoff, Paul Glue
Patients receiving ketamine for refractory depression and anxiety report dissociative symptoms in the first 60 min post-dose. The most commonly used instrument to assess this is the Clinician-Administered Dissociative States Scale (CADSS), developed based on the assessment of patients with dissociative symptoms. Its psychometric properties for ketamine-induced dissociation have not been reported. We evaluated these from a study using 0.25-1 mg/kg ketamine and midazolam (as an active control) in 18 patients with treatment-resistant anxiety...
October 2017: Journal of Psychopharmacology
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