Brisbane Broncos star Ezra Mam has been charged over a head-on car crash last month.

Police allege Mam failed a roadside drug test at the site of the accident in the Brisbane suburb of Bardon, and a further drug test in hospital.

Mam was charged with one count of drive while relevant drug is present in blood, and driving without a licence.

Broncos chief executive Dave Donaghy said the NRL club would "respect the legal process and will continue to work with the NRL Integrity Unit on next steps".

"Ezra is currently seeking external support and we will give him the time and space to do so," he said in a club statement.

"As the matter is now before the courts, we are unable to make further comment on this matter."

Mam is set to appear in Brisbane Magistrates Court on December 16.

The 21-year-old was driving his Ford Ranger ute when it collided with a Toyota Camry on October 18. Two occupants, including a child, suffered minor injuries.

The week after the incident, Donaghy said it was "a grow-up moment" for Mam and the club.

The length of any rugby league ban will be determined by the NRL.

Canterbury winger Josh Addo-Carr and Cronulla playmaker Braydon Trindall both tested positive to driving under the influence of an illicit drug in the 2024 season, but Mam's situation is compounded by his accident, which caused injuries and trauma to three victims.

The NRL fined Addo-Carr $15,000 and suspended him for four matches after he tested positive to driving under the influence of cocaine on September 6.

Trindall was stood down by the Sharks and missed five matches after a mid-range drink-driving offence in April when he also tested positive to having an illicit drug in his system.

ABC/AAP