More than a third of sick children treated with medicinal cannabis through the Victorian government have left the program after failing to respond to the drugs.
A parliamentary inquiry into the 2018-19 budget estimates was told in May that 13 out of 34 children have left the program since it began in March, 2017.
As part of the $28 million program, the government provides access to imported medicinal cannabis for 29 of the state's most severely ill children with intractable epilepsy.