North Queensland police officer and former One Nation candidate Leanne Rissman has been stood down after being accused of using her gun while off duty and affected by alcohol.

The 51-year-old senior constable stood for Pauline Hanson's One Nation party in the seat of Townsville in the 2015 Queensland election.

The Queensland Police Service (QPS) said it was investigating a Northern Region officer, understood to be Ms Rissman, for attending rostered duties whilst affected by alcohol, failing to properly store and secure equipment, failing to treat people with respect and dignity, and posting personal comments on social media site Facebook which conflict with her position as a member of the police force.

In 2014 Ms Rissman caused controversy when she was found to have made disparaging remarks about Indigenous Australians on Facebook under the name Anne T Sharia and was ordered to undertake cultural counselling.

In a statement, QPS said the senior constable would continue to be paid while the current investigation by the ethical standards command was underway, but that she would perform non-operational duties.

The circumstances surrounding the allegations were not explained by QPS.

There is no information about the nature of the information allegedly posted on Facebook.

But the statement said while off duty the senior constable "utilised a Queensland Police Service firearm whilst affected by alcohol" and that she "failed to treat people with respect and dignity".

"This does not mean that the allegations against the officer have been substantiated," the statement read.