The suicide death of a Queenslander who took assisted dying drugs intended for their spouse has “fatally exposed” the state’s voluntary euthanasia laws, a coroner says.

Coroner David O’Connell has called on the state government to ensure that voluntary assisted dying (VAD) drugs are no longer left with patients and that health practitioners oversee patient self-administration of them.

“Any state-sanctioned euthanasia program can only have one objective … precisely 100% compliance and that no innocent nor unintended person is in any way harmed,” he said in findings published on Wednesday.

The Queenslander’s spouse was approved for VAD but hospitalised on the same day that a VAD case worker hand-delivered the lethal substance to the couple’s rural home, Mr O’Connell said.