Clinicians at Seattle Children’s are trying to learn more about Autism Spectrum Disorder (ASD) and to examine the effects of an investigational medication, called GWP42003-P (a cannabidiol oral solution). We are conducting this study to look at whether or not this medicine helps communication, social skills, and patterns of behavior in children and adolescents with ASD. If your child is aged between 6 and 17 years, and has a diagnosis of ASD and episodes of irritability, please feel free to contact our study coordinator, Stacy Riffle, at 206-987-7502 or email [email protected] to find out more.