The assistant health minister posted on social media that she went to the police and the hospital on Sunday morning after she was allegedly drugged and assaulted on a night out in her electorate of Yeppoon, a town in central Queensland.
"Tests at the hospital confirmed the presence of drugs in my body which I did not take. This substance impacted me significantly," she said in a statement.
Ms Lauga was reportedly contacted by other women who alleged they were also drugged on the Saturday evening.
"This could have happened to anyone and tragically, it does happen to many of us," she said.
"It's not ok. We should be able to enjoy socialising in our town without the risk of being drugged or assaulted."
Queensland Police confirmed officers are investigating a sexual assault complaint regarding an incident in Yeppoon on Sunday.
"Investigations into this matter are ongoing," police said in a statement.
The Member for Keppel said she was taking time to physically and emotionally heal after the alleged incident but thanked members of the public who reached out to show their support.
"I truly value your thoughtful messages, gestures and kindness."
Premier Steven Miles said Ms Lauga had experienced an incident that nobody should and extended his support to the MP.
"No one should have to go through what Brittany is going through," he said in a statement.
"My sole focus is on Brittany and her wellbeing. I've told Brittany that we're here to support her, whatever she needs."
Housing Minister Meaghan Scanlon said she and her parliamentary colleagues were shocked by the allegations.
"Reading through that statement is really difficult reading," she told reporters on Saturday.
"Brittany is a colleague. She is a friend. She is a young woman in Queensland parliament."
Cabinet has extended their support to Ms Lauga as she takes time away from parliament to recover from the alleged incident, Ms Scanlon added.
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