A man has attempted to take a cannabis plant into Parliament House in Hobart during an inquiry into medicinal cannabis.

Tasmania's Legislative Council is holding the final day of its inquiry, which was set up after the State Government rejected a bid for medicinal cannabis trials in the state.

Rueben Reeves, from a group called Medical Cannabis Tasmania, took the plant through security at the front door.

But committee chairwoman Ruth Forrest stopped him and another man, John Reeves, from taking it into the inquiry room and they were ordered to take it back to their car.

The men said they believed they were allowed to use it, under parliamentary privilege, as part of their submission to the inquiry.

Jim Wilkinson, who is the Upper House president, said one of the men also wanted to wear a Viking helmet.

He said the issue was not about the plant being illegal, but that both items amounted to props and were not subject to privilege.

"Some incorrectly think that being in Parliament gives parliamentary privilege, but that is only before the committee, not before of afterwards when outside the committee room," he said.

"The advice was given to him that whatever the plant was he can't take that inside and he best take it from the premises, which he did along with the helmet."

Mr Wilkinson said he had not seen a similar incident in 19 years in Parliament.

Patients 'should not have to grow medicine'

Earlier, the inquiry was told it should not be up to people who were ill to have to grow their own medicine.

Tasman Health Cannabinoids (TasCann) wanted to conduct the trials in conjunction with the University of Tasmania.

Medicinal cannabis timeline June 29: TasCann proposes trial in Tasmania

TasCann proposes trial in Tasmania July 1: TasCann's proposal rejected by Tas Government

TasCann's proposal rejected by Tas Government July 4: Legislative Council resolves to hold inquiry

Legislative Council resolves to hold inquiry August 1: TasCann project approved by Norfolk Island

TasCann project approved by Norfolk Island August 14: Norfolk Island approval overturned

Norfolk Island approval overturned September 9: Victoria backs trials of medical cannabis

Victoria backs trials of medical cannabis September 17: NSW announces clinical trial

NSW announces clinical trial September 18: Tasmanian upper house inquiry begins

The head of TasCann, Troy Langman, said patients should not have to resort to growing their own medicine.

He also said clinical trials were not not needed because it was known that medicinal cannabis was non-toxic and did not kill people.

Tasmania should instead be looking to international best practice, including a trial in Israel, he said.

TasCann is shifting the company's head office from Tasmania to Sydney, but Mr Langman said he would consider being part of a collaborative trial with more than one state.

Other states are also considering trials.

Last week, the New South Wales Government announced a clinical trial and the Victorian Government flagged new laws to allow trials.

Pressure is also building in Western Australia, with a Liberal MP breaking ranks to support a change in the law.

Patient tells inquiry of medicinal cannabis 'miracle'

The inquiry has heard more evidence from patients who said they had experienced the benefits of the drug.

Inga Oates, a sufferer of severe osteoporosis, was brought to tears talking about her use of medicinal cannabis.

Her husband of 53 years, Ian, had been hers carer for the past 13 years, she said.

Sorry, this video has expired Medical cannabis trials dismissed as "re-inventing the wheel" ( Ellen Coulter )

Mrs Oates said she did now know what she would do without medicinal cannabis, which had alleviated nausea, asthma and boils among other things.

"I just couldn't believe that such a miracle had happened," she told the inquiry.

"I just sobbed my heart out to think that there was such a miracle."

Last week the mother of a nine-year-old girl gave evidence of how it had helped control her daughter's seizures.

Nicole Cowles said she had been contacted by scores of people whose chronic conditions had been relieved by using cannabis.

The Upper House committee is expected to release an interim report before it submits findings to Parliament next year.

Legalising medicinal cannabis is expected to be raised at next month's meeting of the Council of Australian Governments (COAG).