Medicinal cannabis advocates are pleading for compassion and urging Australian authorities to legalise the drug to help ease the pain and suffering of those who desperately need it.

It follows the South Australian police raid on Adelaide supplier Jenny Hallam's property last week that sparked an outcry from families who rely on her for the supply of cannabis oil.

In Queensland, doctors will be able to prescribe medicinal cannabis for patients in March after laws were passed by State Parliament last October.

But advocates believe the three-month wait could cost people their lives.

Queensland advocate Rebecca Bridson said she was willing to be arrested and would continue to flout the law by helping to source the illegal drug for the sick and terminally ill.

"They can arrest me and they can charge me," she said.

"That's part and parcel of the risk we take, but what harm am I doing. Where's my victim?"

'It scares me that I have to do this'

Bribie Island mother Katrina Spraggon said her eight-year-old daughter suffered life-threatening epilepsy and would die without the drug which had dramatically reduced the number and severity of her seizures.

"Please give us amnesty, not just for me but for millions of people," she said.

Katrina Spraggon says cannabis oil has reduced the number of seizures Kaitlyn has. ( ABC News: Jo Skinner )

"There's that many cannabis community patients and they're too scared to come forward in case they get prosecuted.

"It's a joke. If everyone came forward and actually said what they're on, this would be legalised. I'm over it."

The parents of a 14-year-old girl with an inoperable brain cancer are also applauding the benefits of medicinal cannabis oil.

Linda Bonaccorsi says regular MRI's are evidence her daughter's tumour has changed dramatically from a hard lump to a jelly-like substance since using the drug.

"A few months ago she was not walking, she couldn't feed herself," she said.

"She could do nothing but look at her now, she's so strong and the oil is 100 per cent I reckon.

"The only side-effect Becky gets is sometimes she gets tired."

Ms Bonaccorsi said she was not comfortable with breaking the law by using the illegal drug, but nothing else was working.

"I don't have a choice, it scares me that I have to do this."

The families say they are not criminals and medicinal cannabis is saving and prolonging people's lives.