During the 14-week study, frequency of convulsive seizures decreased from an average of 12.4 to 5.9 per month in the cannabidiol group, compared with 14.9 to 14.1 in the placebo group. On average, the change in seizure frequency amounted to a 39% decrease for the cannabidiol group patients, compared with a roughly 13% decrease among the placebo group. Overall, parents in the cannabidiol group felt that they witnessed "significantly greater" positive changes in their children than parents in the placebo group. Most (93%) of the cannabidiol patients reported side effects, though three-quarters of the placebo group patients did as well. Nine out of 61 cannabidiol group patients dropped out of the study, eight of them because of side effects, compared with just three of the 59 placebo group patients.

Source: CNN May 24, 2017 21:22 UTC