vivian's doctor, epilepsy expert warren davinski. >> i think one of the reasons marijuana is probably safe is it's related to the cannabidiol receptors. if you have too much stimulation or inhibition of them, they don't shut off breathing or respiration. >> and that's key. the current potent epilepsy drugs impact many parts of the brain, including the brain stem. they can essentially shut off the body's vital functions if you take too much. marijuana does not do that. and that's why it's virtually unheard of to have a marijuana overdose. it's one of the reasons so many doctors are starting to change their minds on cannabis. but we are talking about children, young children. and that's going to understandably raise concerns. the latest research shows some strains of marijuana do have a profound effect on the brains of users under the age of 25. >> thc in some good studies has been linked to psychiatric disorders, memory disorders in children under 16. even though it's low thc content, there may be long-term side effects. >> what are you worried about the most in the long run? >> the fa

vivian's doctor, epilepsy expert warren davinski. >> i think one of the reasons marijuana is probablye is it's related to the cannabidiol receptors. if you have too much stimulation or inhibition of them, they don't shut off breathing or respiration. >> and that's key. the current potent epilepsy drugs impact many parts of the brain, including the brain stem. they can essentially shut off the body's vital functions if you take too much. marijuana does not do that. and that's why it's virtually unheard of to have a marijuana overdose. it's one of the reasons so many doctors are starting to change their minds on cannabis. but we are talking about children, young children. and that's going to understandably raise concerns. the latest research shows some strains of marijuana do have a profound effect on the brains of users under the age of 25. >> thc in some good studies has been linked to psychiatric disorders, memory disorders in children under 16. even though it's low thc content, there may be long-term side effects. >> what are you worried about the most in the long run? >> the fact t

vivian's doctor, epilepsy expert warren davinski. >> i think one of the reasons marijuana is probablyis it's related to the cannabidiol receptors. if you have too much stimulation or inhibition of them, they don't shut off breathing or respiration. >> and that's key. the current potent epilepsy drugs impact many parts of the brain, including the brain stem. they can essentially shut off the body's vital functions if you take too much. marijuana does not do that. and that's why it's virtually unheard of to have a marijuana overdose. it's one of the reasons so many doctors are starting to change their minds on cannabis. but we are talking about children, young children. and that's going to understandably raise concerns. the latest research shows some strains of marijuana do have a profound effect on the brains of users under the age of 25. >> thc in some good studies has been linked to psychiatric disorders, memory disorders in children under 16. even though it's low thc content, there may be long-term side effects. >> what are you worried about the most in the long run? >> the fact tha

vivian's doctor, epilepsy expert warren davinski. >> i think one of the reasons marijuana is probably the cannabidiol receptors. if you have too much stimulation or inhibition of them, they don't shut off breathing or respiration. >> and that's key. the current potent epilepsy drugs impact many parts of the brain, including the brain stem. they can essentially shut off the body's vital functions if you take too much. marijuana does not do that. and that's why it's virtually unheard of to have a marijuana overdose. it's one of the reasons so many doctors are starting to change their minds on cannabis. but we are talking about children, young children. and that's going to understandably raise concerns. the latest research shows some strains of marijuana do have a profound effect on the brains of users under the age of 25. >> thc in some good studies has been linked to psychiatric disorders, memory disorders in children under 16. even though it's low thc content, there may be long-term side effects. >> what are you worried about the most in the long run? >> the fact that we don't underst