Transient Retinal Dysfunctions after Acute Cannabis Use

Although cannabis is very widespread worldwide, the impact of cannabis on visual function remains poorly understood. This is partly due to numerous difficulties met in developing clinical studies in cannabis users. Here, we report the first documented case of neuroretinal dysfunction after acute cannabis smoking. This observation was favored by the need of an annual ophthalmic evaluation in the context of a chloroquine intake for a systemic lupus erythematosus in a 47-year-old heavy cannabis user. A complete ophthalmic evaluation including visual acuity tests, intraocular pressure, fundoscopic examination, automated 10° central visual field, full-field electroretinogram (ERG) and multifocal ERG was performed twice - 30 min and 5 h after cannabis smoking. A strong decrease (up to 48%) in the a-wave amplitude of the full-field ERG was measured 30 min after cannabis smoking for all scotopic responses compared with the responses 5 h after smoking. Other tests showed reproducible results between the 2 series of measurements. This clinical case suggests that acute inhalation of cannabis affects the photoreceptors functioning. This rare situation suggests further investigations are required on the impact of cannabis on retinal processing, especially since cannabis has been incriminated in car injuries.Eur Addict Res 2016;22:287-291
Source: European Addiction Research - Category: Addiction Source Type: research

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This week’s Psychology Around the Net takes a look at what to do if you think your child is at risk for mental illness, why self-regulation is so important for people with ADHD, the symptoms of problematic smartphone use, and the mental and physical fatigue that often accompanies chronic illness, and more.     Does Mental Illness Run in Families?: What should you do if you suspect your child is at risk of developing a mental disorder — especially when mental illness runs in your family? According to psychologist Scott Bea PsyD, an important first step is helping your child build resilience, a persona...
Source: World of Psychology - Category: Psychiatry & Psychology Authors: Tags: ADHD and ADD Anxiety and Panic Autism Children and Teens Depression Disorders Family General Health-related Mental Health and Wellness Parenting Psychiatry Psychology Psychology Around the Net Research Asd Bipolar Disorder Source Type: blogs
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Source: MMWR Morb Mortal Wkl... - Category: Epidemiology Authors: Tags: MMWR Morb Mortal Wkly Rep Source Type: research
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Source: Frontiers in Psychiatry - Category: Psychiatry Source Type: research
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Source: Frontiers in Pharmacology - Category: Drugs & Pharmacology Source Type: research
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Source: Science - The Huffington Post - Category: Science Source Type: news
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Source: Revue d Epidemiologie et de Sante Publique - Category: Epidemiology Tags: Rev Epidemiol Sante Publique Source Type: research
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Source: Science - The Huffington Post - Category: Science Source Type: news
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Source: Healthy Living - The Huffington Post - Category: Consumer Health News Source Type: news
To the Editor: The meta-analysis by Chasset et al1 indicates that antimalarial drugs, including chloroquine and hydroxychloroquine (HCQ), are less effective in smokers compared to nonsmokers with cutaneous lupus erythematosus (CLE). The authors draw the conclusion that practitioners should strongly suggest smoking cessation to patients with CLE. While this would be an ideal approach, the addictive nature of tobacco makes this strategy unfeasible in a significant subset of patients.
Source: Journal of the American Academy of Dermatology - Category: Dermatology Authors: Tags: JAAD online Source Type: research
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