The NRL has come down on Josh Addo-Carr for his drug-driving arrest, hitting the Canterbury winger with a breach notice for bringing the game into disrepute.

League bosses confirmed on Tuesday that Addo-Carr, who fronted the integrity unit last week, would be sanctioned over the incident.

Under the game's rules, head office does not publish the details of sanctions, however, Addo-Carr's is expected to sit at close to a four-game ban along with a fine.

Addo-Carr has continued to claim he does not know how the cocaine, which was detected during a roadside test this month, got in his system, arguing he did not take illicit drugs.

The 29-year-old has until next Tuesday to respond to the breach notice, but realistically his bigger battle looms at the Bulldogs.

Canterbury bosses are yet to decide what action they will take against him, but there remains every chance he has played his last game for the club.

Bulldogs supremo Phil Gould said last week it was too soon to say whether Addo-Carr would be shown the door.

"I believe he's still protesting his innocence but at the end of the day it's in his system when he takes the drug test," Gould said last week on 100% Footy.

"How it got there, he needs to work that out and explain that to the people that count.

"[The board] may or may not take my recommendation. They may or may not have another point of view.

"At the end of the day, we'll do what we think is in the best long-term interest of the club. It's as simple as that and all the players understand that: club first, team second, individual third. That's what we'll do."

Addo-Carr has already accepted a $682 fine from NSW Police and a three-month ban from driving over the incident.

The drug test also prompted him to stand down from Canterbury's elimination final against Manly, which it lost 24-22.

Any ban handed down by the NRL would extend into Addo-Carr's time at another club, if he was to be sacked by the Bulldogs and signed by a rival.

AAP