Ireland had been feeling unwell — experiencing dizziness and hot and cold flushes — for three days and her partner was not around to transport her, Lawrence said.
"She's put her health first and she should have explored other options," she said.
When police breathalysed Ireland she gave a reading of 202mcg, which normally would not result in a charge being laid as the legal limit is 250mcg.
The defendant was on a zero-alcohol licence at the time.
It was Ireland's third such offence in the past seven years.
In 2013, with a level of 1119mcg, she was given a rehabilitative sentence but that did not stop her returning to court in 2016 with a slightly lower reading.
On that occasion she was given intensive supervision and community work.
O'Brien yesterday sentenced Ireland to nine months' supervision and fined her $200. She was banned from driving for 28 days after which the alcohol-interlock regime would apply.