A CNN program that featured Charlotte's Web cannabis in 2013 brought increased attention to the use of CBD in the treatment of seizure disorders. Since then, 16 states have passed laws to allow the use of CBD products with a doctor's recommendation (instead of a prescription) for treatment of certain medical conditions. This is in addition to the 30 states that have passed comprehensive medical cannabis laws, which allow for the use of cannabis products with no restrictions on THC content. Of these 30 states, eight have legalized the use and sale of cannabis products without requirement for a doctor's recommendation.
Relevant studies in animal models are summarized in chronological order in Table Table1.1. CBD has been studied in a wide range of animal models of general anxiety, including the elevated plus maze (EPM), the Vogel-conflict test (VCT), and the elevated T maze (ETM). See Table Table11 for the anxiolytic effect specific to each paradigm. Initial studies of CBD in these models showed conflicting results: high (100 mg/kg) doses were ineffective, while low (10 mg/kg) doses were anxiolytic [59, 60]. When tested over a wide range of doses in further studies, the anxiolytic effects of CBD presented a bell-shaped dose–response curve, with anxiolytic effects observed at moderate but not higher doses [61, 90]. All further studies of acute systemic CBD without prior stress showed anxiolytic effects or no effect [62, 65], the latter study involving intracerebroventricular rather than the intraperitoneal route. No anxiogenic effects of acute systemic CBD dosing in models of general anxiety have yet been reported. As yet, few studies have examined chronic dosing effects of CBD in models of generalized anxiety. Campos et al.  showed that in rat, CBD treatment for 21 days attenuated inhibitory avoidance acquisition . Long et al.  showed that, in mouse, CBD produced moderate anxiolytic effects in some paradigms, with no effects in others.
“Pre-clinical evidence largely shows that CBD can produce beneficial effects in AD, PD and MS patients, but its employment for these disorders needs further confirmation from well-designed clinical studies. CBD pre-clinical demonstration of antiepileptic activity is supported by recent clinical studies in human epileptic subjects resistant to standard antiepileptic drugs showing its potential use in children and young adults affected by refractory epilepsy.” View Source
How does CBD compare to hemp oil or hemp extract? The latter comes from the seeds of the hemp plant, but does not contain the same amount of cannabinoids found in cannabis oil, as these cannabinoids are extracted from the whole plant. When cannabis has low levels of THC (under 0.3 percent) and high levels of CBD, it’s often called CBD hemp or industrial hemp.
So am I to assume, due to no response/deleted comment that my simple question was too difficult to answer? With all the technical & correct information you have on you GREAT website, can someone (?) not simply correct or acknowledge the FACT the your NOT using nano-particle size product? I am truly interesting (for my wife) in CBD, have done my research, and I love working with numbers which is why if found this discrepancy. Comments welcome, but avoidance is disturbing.
If you have dealt with anxiety before, you are not alone. As the author of a 2015 article published in the Dialogues in Clinical Neuroscience says: "Anxiety disorders...are the most prevalent mental disorders and are associated with immense health care costs and a high burden of disease." Yet many are finding that pharmaceuticals won't do, especially for chronic use, and they are turning increasingly to supplements and cannabidiol (CBD) oil for anxiety. 
And then I woke up on the concrete, a worried crowd gathered around me. “You had a seizure,” my friend said gently as I blinked my eyes, trying to process this new information. I remember it was warm that night because I was wearing a sundress, and when I finally regained consciousness my first worry was that my dress flew up and everyone could see my underwear.
@lalyfa In 2010 I went off a cocktail of psychotropics including antidepressants, antianxiety and antipsychotics cold turkey. The meds were wrong for me and the withdrawal was severe and I rarely slept, had RLS, neuropathy and cranky beyond words. Some of these meds took 9+ months to clear my system. Be sure to follow doctor's advice. I did not have a doctor at the time and would not go to the ER knowing it would have resulted in more abuse. Not an intelligent thing to do and not sorry I made the choice even though the experience was horrific and would not reccomend anyone go this route. As to how long the withdrawal lasts the best thing is to discuss this with a pharmacist as this is where their training is and they understand much better and be of help. Wishing you the best.
Cannabidiol oil is extracted from the varieties of cannabis plants that have CBD occurring naturally in large amounts and THC in low amounts. To ensure a high concentration of CBD in the oil, a specialized process is used to extract the compound. The oil contains other compounds like terpenes, omega-3 fatty acids, amino acids, chlorophyll, vitamins, and phytocannabinoids like cannabigerol, cannabichromene, cannabidivarin, and cannabinol.