Poison mushroom cook Erin Patterson has been approved for weight loss drugs in solitary confinement as she serves a life sentence.

News Corp reports that the self-confessed binge eater had been granted the injections in recent weeks.

It’s understood the medication was approved due to the impact of the notorious inmate being locked in her solitary cell for up to 23 hours a day, limiting her exercise.

A Department of Justice and Community Safety told The Herald Sun that access to weight loss drugs like Ozempic were provided based on a doctor’s advice.

“Prescriptions are only given by clinicians when there’s a clear medical need – like preventing serious conditions such as type 2 diabetes,” she said.

Patterson, 51, was sentenced to life behind bars after she killed her three lunch guests by serving them beef Wellingtons laced with death cap mushrooms in July 2023.

Victoria’s top prosecutor Brendan Kissane KC is challenging her 33-year minimum term that makes her eligible for parole in her 80s.

The prosecutor argued the judge made a mistake giving Patterson a chance at walking from prison.

Patterson is separately fighting to quash her murder convictions, arguing she suffered a substantial miscarriage of justice.

A jury found Patterson deliberately served beef Wellingtons laced with death cap mushrooms to her former in-laws Don and Gail Patterson, 70, and Gail’s sister Heather Wilkinson, 66.

The three guests died after the July 2023 lunch at Patterson’s Leongatha home, in regional Victoria.

Heather’s husband Ian fell seriously ill from the meal but survived.

Patterson was also convicted of Mr Wilkinson’s attempted murder.

Mr Wilkinson and other members of the Wilkinson and Patterson families were back in court on Thursday, alongside members of the public and dozens of journalists.

Justices Stephen McLeish, Lesley Taylor and Peter Kidd will hand down their decision on the two appeals at a later date.

-with AAP