Abstract Background: Cannabis is legal for recreational and medical use in Canada. Our aim was to explore family experiences using medical cannabis for children with severe conditions in the context of legalization. Methods: We conducted a qualitative study using semistructured interviews between April and July 2019. Participants were parents of children attending BC Children’s Hospital oncology or palliative care clinics, recruited through posters, emails or referral. Participants were included if they spoke English and their child used any type of cannabis for medical purposes. Interviews included open-ended questions about the child’s cannabis use. Interviews were recorded and transcribed, and thematic analysis was performed using qualitative description....