Victorian firefighter Troy Thornton, who had multiple system atrophy, travelled with his wife Christine to a Swiss euthanasia clinic.

The mother of veteran Victorian firefighter Troy Thornton who died in a Swiss euthanasia clinic is calling on Australian politicians to "take notice" of his story.

Barbara Spencer said her 54-year-old son, who had multiple system atrophy - a progressive neurodegenerative disorder - had to travel to a clinic in Switzerland because he wasn't considered as having a terminal illness under Victorian law.

Mr Thornton died by lethal injection late on Friday, Australian time, after prominent voluntary euthanasia advocate and founder of Exit International, Philip Nitschke, helped connect him with Life Circle in Basel.

Victoria is set to become the first Australian state to legalise voluntary assisted dying, which takes effect on June 19.