Stephen Taylor's daughter's, Morgan, 21, and Ariel, 25, suffer from Crohn's disease, a debilitating bowel disease.
Mr Taylor began to grow and juice his own cannabis after struggling to find a doctor who would help him through the Therapeutic Goods Administration's (TGA) lengthy application process to legally access medical marijuana.
Bastian Seidel, president of the Royal College of GPs, is frustrated that so few patients are being given the option to access medicinal cannabis and so few doctors are being allowed to prescribe it.
"There are 38,000 GPs in the country — only one of them is an authorised prescriber for medicinal cannabis," he told 7.30.
In a statement to 7.30, the TGA said 249 individual medical practitioners have had applications approved under its Special Access Scheme.