CBD is considered safe to use but there is still much needed research to discover if there are any major side effects. This is why clinical trials are necessary before it is legalised as a medicine worldwide. GW Pharmaceuticals released the interim results of its clinical trials and showed that “The safety profile of CBD was particularly reassuring, with no serious adverse events and an overall frequency of adverse events very similar to placebo. The most common adverse events (occurring in 5% or more patients resulting from all causes) were Diarrhea, Nausea and Headache.” A review of the scientific literature by Bergamaschi (2011) published in “Current Drug Safety” showed that CBD is non-toxic, does not affect physiological parameters (heart rate, blood pressure and body temperature), does not affect gastrointestinal transit and does not alter psychomotor or psychological functions. High doses up to 1,500 mg/day of CBD are reportedly well tolerated in humans.
