Sanna Marin was speaking at a news conference after videos showed her partying with celebrities.
Finland’s prime minister has said she has taken a drug test, after new footage emerged showing the leader dancing with a Finnish popstar.
Sanna Marin, 36, came under fire this week after a leaked video showed her partying, with some politicians saying she should be tested for narcotics.
At a news conference on Friday, Ms Marin said she took the test on Friday, with the results expected next week.
Ms Marin repeated her denials that she has ever taken drugs.
“I did nothing illegal,” she said at Friday’s news conference in Helsinki.
“Even in my teenage years I have not used any kind of drugs,” Ms Marin said, adding that she took the drug test to allay any concerns.
Ms Marin also insisted that she is entitled to the presumption of innocence.
Reporters questioned whether the prime minister, who has been in power since December 2019, would have been able to make snap governmental decisions if necessary.
“I don’t remember a single time that there was a sudden situation in the middle of the night to go to the State Council Palace,” she insisted.
“I think my ability to function was really good. There were no known meetings on the days I was partying.”
Although Ms Marin acknowledged she was constantly being filmed, she said she was upset that the footage had become public.
“I trust that people understand that leisure time and work time can be separated,” she added.
Formerly the world’s youngest head of government – a title now held by Chilean President Gabriel Boric – Ms Marin makes no secret of partying, and has often been photographed at music festivals.
Last year she apologised for going clubbing after coming into close contact with a Covid-19 case.
Just last week, Ms Marin was dubbed the “coolest prime minister in the world” by German news outlet Bild.
This is a breaking news story, and is being updated.