Police in Manchester say Eminem is free to go ahead with his two London shows.
They seized a video of his performance at Manchester Arena.
He took pills on stage which may have been a form of Ecstasy.
Officers are investigating whether the rapper committed any offences under the Misuse of Drugs Act.
But Chief Inspector Steve White has told Ananova: "We're not going to be looking at questioning Mr Mathers at this stage.
"We will be looking at the video first and then we'll be having a meeting on Monday."
A spokesman for London Arena says Eminem's shows will definitely go ahead.