Can the cbd oil currently available on internet help control intractable epilepsy? how do you know what dose to use

For Davet'sSyndrome: CBD Oil is one of the 85 active cannabinoids identified in cannabis.It is a major phytocnnabinoid accounts for 40% of plants extract.It has been used in US for Davet's Syndrome under the brand name Epidiolex Davet's Syndrome is a rare form of epilepsy which is difficult to treat and is also known as severe myoclonic epilepsy of infancy is rare and intractable epilepsy and cbd oil may be good for