Anxiolytic effects of CBD in models of generalized anxiety have been linked to specific receptor mechanisms and brain regions. The midbrain dorsal periaqueductal gray (DPAG) is integral to anxiety, orchestrating autonomic and behavioral responses to threat , and DPAG stimulation in humans produces feelings of intense distress and dread . Microinjection of CBD into the DPAG produced anxiolytic effects in the EPM, VGC, and ETM that were partially mediated by activation of 5-HT1ARs but not by CB1Rs [65, 68]. The bed nucleus of the stria terminalis (BNST) serves as a principal output structure of the amygdaloid complex to coordinate sustained fear responses, relevant to anxiety . Anxiolytic effects of CBD in the EPM and VCT occurred upon microinjection into the BNST, where they depended on 5-HT1AR activation , and also upon microinjection into the central nucleus of the amygdala . In the prelimbic cortex, which drives expression of fear responses via connections with the amygdala , CBD had more complex effects: in unstressed rats, CBD was anxiogenic in the EPM, partially via 5-HT1AR receptor activation; however, following acute restraint stress, CBD was anxiolytic . Finally, the anxiolytic effects of systemic CBD partially depended on GABAA receptor activation in the EPM model but not in the VCT model [61, 62].
The exclusion criteria for the trial were: (i) presence of organic brain syndromes; (ii) use of psychoactive drugs, including nicotine; (iii) presence of general medical conditions, assessed by the patient’s report during the interview and/or through physical examination; (iv) presence of psychiatric disorders (assessed with the SCID-IV); (v) pregnancy; (vi) previous history of any sleep disorder (based on the Pittsburgh Sleep Quality Index - PSQI); and (vii) recent changes in sleep time (variation of more than 2 h in the last 7 days, measured through the sleep log). Thus, the volunteers were all non-smokers and had not taken any medications for at least 3 months before the study. Moreover, none of them had used marijuana more than five times in their lives (no use in the last year) and none had ever used any other illegal drug. All subjects gave their written consent to participate after being fully informed about the research procedures, which were approved by the Hospital das Clínicas de Ribeirão Preto of University of São Paulo ethics committee (HCRP No. 17912/2013).
He throws open an industrial door, and my eyeballs are scalded by a halo of plasma bulbs. We step into an immense, warm room that smells like a hundred Yes concerts. Once my eyes adjust, I can see the crop in all its rippling glory—close to a thousand female plants standing six feet tall, their roots bathed in a soup of nutrients, their spiky leaves nodding in the breeze of the oscillating fans. Here in a sweep of the eye is more than a half million dollars’ worth of artisanal pot.
If I had to rate the efficacy of the second dosing option for anxiety on a scale of 1 to 10, I’d rate it about a 6. Meaning, it was noticeably more effective than the first low-dose at even just 20 mg. Perhaps in the future I’ll press my luck with an even greater dose of around 60 mg, which is equivalent to 600 mg CBD and the dosage that has been documented as effective for anxiety in clinical research.
A geneticist, Kane studies cannabis from a unique perspective—he probes its DNA. He’s an affable, outdoorsy guy with a bright face and eyes that wander and dart inquisitively when he talks. He has studied chocolate and for many years the sunflower, eventually mapping its genome, a sequence of more than three and a half billion nucleotides. Now he’s moved on to marijuana. Though its sequence is much shorter, roughly 800 million nucleotides, he considers it a far more intriguing plant.
CBD Oil for Anxiety
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