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  • Cannabis, post-traumatic stress disorder (PTSD)
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The Long-Term, Prospective, Therapeutic Impact of Cannabis on Post-Traumatic Stress Disorder

Abstract Introduction: Given the increasing availability and use of cannabis among individuals with post-traumatic stress disorder (PTSD) and the addition of PTSD as an eligible diagnosis in several U.S. medical cannabis programs, the efficacy of dispensary-obtained cannabis needs to be thoroughly examined. Materials and Methods: This prospective study assessed PTSD symptoms and functioning every 3 months over the course of a year in two samples of participants diagnosed with PTSD: (1) those with PTSD using dispensary-obtained cannabis (cannabis users) and (2) those with PTSD, who do not use cannabis (controls). Linear mixed-effects models and generalized estimating equations tested whether trajectories of symptoms differed between the two...
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Use of Cannabis to Relieve Pain and Promote Sleep by Customers at an Adult Use Dispensary

Abstract Medical cannabis patients consistently report using cannabis as a substitute for prescription medications; however, little is known about individuals accessing cannabis through adult-use markets. A survey at two retail stores was conducted in Colorado, United States. Between August 2016 and October 2016, store staff asked customers if they wanted to participate and, if so, provided an electronic survey link. All customers reporting medical certification were excluded. Of 1,000 adult-use only customer respondents, 65% reported taking cannabis to relieve pain and 74% reported taking cannabis to promote sleep. Among respondents taking cannabis for pain, 80% reported that it was very or extremely helpful, and...
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A randomised controlled trial of vaporised Δ9-tetrahydrocannabinol and cannabidiol alone and in combination in frequent and infrequent cannabis users: acute intoxication effects

Please use this link to access this publication: https://link.springer.com/article/10.1007/s00406-019-00978-2 Abstract Access to cannabis and cannabinoid products is increasing worldwide for recreational and medicinal use. Two primary compounds within cannabis plant matter, Δ9-tetrahydrocannabinol (THC) and cannabidiol (CBD), are both psychoactive, but only THC is considered intoxicating. There is significant interest in potential therapeutic properties of these cannabinoids and of CBD in particular. Some research has suggested that CBD may ameliorate adverse effects of THC, but this may be dose dependent as other evidence suggests possible potentiating effects of THC by low doses of CBD. We conducted a randomised placebo controlled trial to examine the acute effects...
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Oral Cannabidiol does not Alter the Subjective, Reinforcing or Cardiovascular Effects of Smoked Cannabis

Abstract Cannabidiol (CBD), a constituent of cannabis with few psychoactive effects, has been reported in some studies to attenuate certain aspects of Δ(9)-tetrahydrocannabinol (THC) intoxication. However, most studies have tested only one dose of CBD in combination with one dose of oral THC, making it difficult to assess the nature of this interaction. Further, the effect of oral CBD on smoked cannabis administration is unknown. The objective of this multi-site, randomized, double-blind, within-subject laboratory study was to assess the influence of CBD (0, 200, 400, 800 mg, p.o.) pretreatment on the reinforcing, subjective, cognitive, and physiological effects of smoked cannabis (0.01 (inactive), 5.30-5.80% THC)....
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Anxiolytic Effects of Repeated Cannabidiol Treatment in Teenagers With Social Anxiety Disorders

Abstract Accumulated evidence indicates that cannabidiol (CBD), a nonpsychotomimetic and nonaddictive main component of the Cannabis sativa plant, reverses anxiety-like behavior. The purpose of the present study was to assess the efficacy of CBD treatment for Japanese late teenagers with social anxiety disorder (SAD). Thirty-seven 18–19-year-old Japanese teenagers with SAD and avoidant personality disorder received, in a double-blind study, cannabis oil (n = 17) containing 300 mg CBD or placebo (n = 20) daily for 4 weeks. SAD symptoms were measured at the beginning and end of the treatment period using the Fear of Negative Evaluation Questionnaire and the Liebowitz Social Anxiety Scale. CBD significantly decreased anxiety measured...
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The association between cannabis use and anxiety disorders: Results from a population-based representative sample

Please use this link to access this publication: https://www.sciencedirect.com/science/article/abs/pii/S0924977X15004204?via%3Dihub Abstract The cross-sectional association between cannabis use and anxiety disorders is well documented, yet less is known about the longitudinal association between the two. This study explored the association between cannabis use, cannabis use disorders (CUDs) and anxiety disorders in a 3-year prospective study. Data was drawn from waves 1 and 2 of the National Epidemiologic Survey on Alcohol and Related Conditions (NESARC). Anxiety disorders, including generalized anxiety disorder, social anxiety, panic disorder and specific phobias, were controlled for at baseline. Initiation of cannabis use was defined as any cannabis use by former lifetime abstainers in...
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Association of Cannabis With Long-Term Clinical Symptoms in Anxiety and Mood Disorders: A Systematic Review of Prospective Studies

Please use this link to access this publication: https://www.psychiatrist.com/jcp/cannabis-and-anxiety-and-mood-disorders/ Abstract Objective: To systematically review studies examining the longitudinal associations between cannabis use and symptomatic outcomes among individuals with an anxiety or mood disorder at baseline. Data sources: A search of the literature up to May 2017 was conducted using several databases. Search terms related to the exposure (ie, cannabis) and outcome (ie, symptoms) variables of interest. There were no search restrictions. Study selection: In total, 10,191 citations were screened. Key inclusion criteria related to (1) cohort-based longitudinal study design using adults who met criteria for a mood or anxiety disorder at baseline, (2) an independent variable focusing on...
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The association between cannabis use and depression: a systematic review and meta-analysis of longitudinal studies

Please use this link to access this publication: https://www.cambridge.org/core/journals/psychological-medicine/article/abs/association-between-cannabis-use-and-depression-a-systematic-review-and-metaanalysis-of-longitudinal-studies/B144B7AE5A3D973289DBDD99ADE21E58 Abstract BackgroundLongitudinal studies reporting the association between cannabis use and developing depression provide mixed results. The objective of this study was to establish the extent to which different patterns of use of cannabis are associated with the development of depression using meta-analysis of longitudinal studies. MethodPeer-reviewed publications reporting the risk of developing depression in cannabis users were located using searches of EMBASE, Medline, PsychINFO and ISI Web of Science. Only longitudinal studies that controlled for depression at baseline were included. Data on several study characteristics, including measures of cannabis use, measures of depression and control variables,...
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The time course and significance of cannabis withdrawal

Please follow this link to access this publication: https://psycnet.apa.org/record/2003-05990-008 Abstract Withdrawal symptoms following cessation of heavy cannabis (marijuana) use have been reported, yet their time course and clinical importance have not been established. A 50-day outpatient study assessed 18 marijuana users during a 5-day smoking-as-usual phase followed by a 45-day abstinence phase. Parallel assessment of 12 ex-users was obtained. A withdrawal pattern was observed for aggression, anger, anxiety, decreased appetite, decreased body weight, irritability, restlessness, shakiness, sleep problems, and stomach pain. Onset typically occurred between Days 1-3, peak effects between Days 2-6, and most effects lasted 4-14 days. The magnitude and time course of these...
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Acute effects of cannabinoids on symptoms of obsessive-compulsive disorder: A human laboratory study

Abstract Background: Preclinical data implicate the endocannabinoid system in the pathology underlying obsessive-compulsive disorder (OCD), while survey data have linked OCD symptoms to increased cannabis use. Cannabis products are increasingly marketed as treatments for anxiety and other OCD-related symptoms. Yet, few studies have tested the acute effects of cannabis on psychiatric symptoms in humans. Methods: We recruited 14 adults with OCD and prior experience using cannabis to enter a randomized, placebo-controlled, human laboratory study to compare the effects on OCD symptoms of cannabis containing varying concentrations of Δ-9-tetrahydrocannabinol (THC) and cannabidiol (CBD) on OCD symptoms to placebo. We used a within-subjects design to increase statistical power....
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