A 32-year-old woman has admitted driving while more than three times the drink-drive limit.
Katherine Kelly failed a breathalyser test with a reading of 111. The legal limit is 35.
The case was adjourned until November 4 to allow time for a probation report to be prepared before sentencing.
Prosecuting advocate Rachael Braidwood told the court how police saw Kelly driving on Lord Street in Douglas on September 12 at 3.55am.
They followed her as she took a sharp turn onto Ridgeway Street without indicating and then onto Athol Street, again without using her indicator.
Kelly, who lives at Glen View Road in Onchan, then parked her car and got out.
However, when she saw police approaching she got back in and climbed into the passenger seat.
She was asked why she had moved to that seat but claimed she had not.
Kelly was described by police as slurring her words and having glazed eyes.
She refused to provide a roadside sample of breath and was subsequently arrested.
At police headquarters she agreed to take the breathalyser test and produced the 111 reading.
The court heard that she has a previous conviction for being drunk in charge of a vehicle in 2008.
Defence advocate Sara-Jayne Dodge asked for a probation report to be prepared before sentencing.
Deputy High Bailiff James Brooks ordered that the report consider all options, including custody.
Bail was granted in the sum of £500 with a condition to contact probation and reside at her home address.