An Ottawa clinic nurse who first noticed a man had received a fatal methadone overdose during treatment told a coroner's inquest that she did not know of any procedure at the facility to deal with such a mistake.

Sandra Nault testified Monday into the death a year ago of 41-year-old Wade Hatt, who was sent home from the government-sanctioned clinic on Somerset Street after the accidental overdose. He later died.

Wade Hatt, 41, died of a methadone overdose while being treated at an Ottawa clinic for painkiller addiction. A coroner's jury is investigating.
(CBC)

The five-member jury is examining Hatt's case to determine the safety of Ontario methadone clinics, where more than 11,000 residents were treated in 2005 for addictions to opiate drugs such as heroin or morphine.

Nault broke down several times while recounting the events leading up to Hatt's death in October 2005.

Nault said she was one of two nurses at the clinic when Hatt arrived with his girlfriend, Julie Maloney, at their normal time.

Nault recalled Hatt, a father of two, was friendly and respectful as usual.

Hatt, who worked as a delivery man, was fighting an addiction to painkillers, and usually took only a 15-milligram dose of methadone, while Maloney's normal dose was 150 mg.

Nault said she mixed each dose with a glass of orange drink, then set the glasses down.

After Maloney and Hatt drank most of each glass, Nault realized the bottles of methadone had been switched — Hatt had received almost 10 times his normal dose.

Nault said she told Hatt to stop drinking.

She had been working at the clinic for a couple of months, but, she said, she did not know of any procedure for dealing with an overdose.

Nault also said she couldn't remember whether she ever read an emergency manual.

Hatt was brought to the bathroom by another nurse, who tried to induce vomiting, with limited success. He was then seen by the clinic doctor.

Wrong phone number in Hatt's file

Meanwhile, Nault contacted an on-call doctor outside the clinic. Nault said no one told her to send Hatt to the hospital.

Instead, Hatt was sent home.

Nault recalled that he smiled and gave her a high-five as he walked out of the clinic.

The second nurse testified that after Hatt left, she was told to call him at home to check on him.

The number in the file was wrong, and when she dialed it, she learned Hatt no longer lived there.

The next morning, she reached Maloney by phone, and learned Hatt died during the night.

Earlier, the coroner's jury was told Hatt died of heart failure.

The inquest continues Tuesday.