When administered alone, CBD is an effective anticonvulsant in maximal electrical shock (MES), magnesium-free, 4-aminopyridine, and audiogenic models (7, 8). Co-administration with AEDs leads to various effects; anticonvulsant effects of CBD are enhanced with phenytoin or phenobarbital but decreased with chlordiazepoxide, clonazepam, trimethadione, and ethosuximide. In a recent study using an acute pilocarpine model, although CBD administration reduced the number of animals displaying seizure activity, CBD did not appear to have any significant effect on the number of seizures per animal (7).
CBD is well tolerated in humans with doses up to 600 mg not resulting in psychotic symptoms (15). In the few small placebo-controlled studies performed, no significant CNS effects were noted. Oral CBD undergoes extensive first-pass metabolism via CYP3A4, with a bioavailability of 6%. Following single doses in humans, the half-life of CBD when taken orally is about 1 to 2 days.1 In vitro studies have shown that CBD is a potent inhibitor of multiple CYP isozymes, including CYP 2C and CYP3A (16, 17). Whether these in vitro observations are relevant at plasma concentrations likely to be seen in patients is unclear. In addition, given its metabolism via CYP3A4, clinical trials of CBD in patients receiving enzyme-inducing AEDs, such as carbamazepine or phenytoin, will require detailed pharmacokinetic studies.

1. Devinsky O, Cilio MR, Cross H, Fernandez-Ruiz J, French J, Hill C, Katz R, Di Marzo V, Jutras-Aswad D, Notcutt WG, Martinez-Orgado J, Robson PJ, Rohrback BG, Thiele E, Whalley B, Friedman D. Cannabidiol: Pharmacology and potential therapeutic role in epilepsy and other neuropsychiatric disorders. Epilepsia. 2014;55:791–802. [PMC free article] [PubMed] [Google Scholar]

A group of 15 patients who received CBD over a period ranging from one month to one year were surveyed to gather various data. The researchers sought information about the patient and the caregiver, changes observed in the seizures, neuropsychological effects, side effects and the family’s overall perception following the use of cannabidiol. This simple observational study identified some very encouraging findings:


Thank you. I am 81 and started the CBD drops night and morning. I sleep better and no longer suffer the excruciating pain from diverticulitis. I saw somewhere that for my asthma I need the THC so got some (totally illegal here in South Africa). I think it is helping. The diagnosis of COPD was made some years ago and as a health psychologist I do all I can to remain healthy for my 97th birthday!! (Both my grandmother and greatgrandmother did so I believe I will too).
Green Label hemp oil has the lowest CBD content of our RSHO™ because the cannabinoids in the oil have not been decarboxylated, making Green Label oil higher in CBDa than our other oils, containing a total of 50 mg of CBD per serving. Our popular Blue Label RSHO™ registers in the middle of our pure hemp oil potencies, containing 85 mg of CBD per serving. Finally, our filtered Gold Label RSHO™ tops out with 120 mg of CBD per serving, the highest of any of our products.

Where do you buy CBD oils? You may have noticed that CBD products are everywhere these days. You can easily find CBD oil and other products online and in certain health food/vitamin stores or spas. To separate the highest quality products from the rest, look for one that has a certificate of analysis, or COA. This means that the manufacturer tests the product for contaminants, and it meets lab standards.


A newcomer to our CBD oils ranking, RE: Botanicals is no stranger to hemp. Founded by John Roulac, a long-time hemp advocate and founder of the organic superfoods brand Nutiva, RE: Botanicals is one of the only CBD brands to earn the USDA organic seal. They deserve a shout-out for prioritizing regenerative agriculture, while keeping prices reasonable.   
Use a water bong and a healthstone if you already have them. Place a healthstone, which is a carbon-stone patty, into your bowl and scoop some CBD oil onto the end of a dabber. Then, hold the end of the dabber just over the healthstone and light the dabber with a lighter. This will heat up the dabber so that the oil falls onto the healthstone and becomes vaporized. Light the bowl and use the water bong normally, by inhaling through the mouthpiece.[1]
Ranging from irritating to debilitating, joint pain can be tricky to treat. If your pain is mild, ibuprofen or acetaminophen might be adequate. But the worse it gets, the more likely you are to be prescribed antidepressants, muscle relaxants, or even opioids. Because of the side effects associated with these prescription medications, there has been quite a bit of research on CBD and joint pain — with promising results. Here are a few studies that point to CBD’s potential:

A survey of patients seen in a tertiary epilepsy center found that 21% of patients admitted to using marijuana in the last year, and 24% of patients believed marijuana to be effective for their seizures (10). While interesting, this anecdotal observation does not rise to the level of evidence needed to evaluate a potential new therapeutic modality.
Many people are tempted to believe that products that contain CBD only are the best, thinking that using just CBD alone is a more effective treatment. While products that contain single-molecule CBD, meaning that you won’t find any other compounds, are already provided as medicines, they are not exactly more efficient than whole plant extract CBD oil, when it comes to therapeutic effects.
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