A man suffering from terminal bone cancer which caused him excruciating pain ended his own life by taking a euthanasia drug.

Max Bromson, who was 66 when he 'chose his time of departure', died on July 28 2014, in an Adelaide motel room surrounded by his family, after swallowing Nembutal.

This week, after a two year police investigation into Mr Bromson's death, his relatives released video of his final moments, in a bid to continue his advocacy for voluntary euthanasia.

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Max Bromson took his own life on July 28, 2014 after a long battle with terminal bone cancer

One family member can be heard saying: 'I love you mate', as he sips on the euthanasia drug.

Another relative then hands him a glass of what looks to be alcohol - possibly scotch or whisky, while saying 'here's something worthwhile'.

The release of the footage comes as South Australian parliament attempts to pass a bill legalising the controversial practice.

Mr Bromson's sister Kerry said they decided to film her brother's last moments 'for legal reasons', as it is illegal to assist someone who is taking their own life.

'The reason we filmed it was probably more for legal reasons, to show we had nothing to do with assisting him,' she told ABC's 7.30.

'We were doing it out of love for our brother.'

'I will choose my own time of departure', Mr Bromson said in a 2012 interview

After being diagnosed with terminal bone cancer in 2012, Mr Bromson began researching euthanasia.

His investigation led him to Philip Nitschke - also known as Dr Death - who is co-founder of pro-euthanasia group Exit International.

Mr Bromson became an outspoken advocate for euthanasia, and told the ABC in 2012 he wanted to make the decision himself about when his life would end.

'I will choose my own time of departure, and that I have chosen a preferred method of departure.'