A man may face charges following a robbery at the Windham Hannaford Bros. supermarket at 2:22 p.m. Saturday.

Windham police said the man robbed the store’s pharmacy of an disclosed amount of Dilaudid, a narcotic pain reliever. Police and Cumberland County Sheriff officers identified a probable suspect, whom they found at 4:25 p.m.

Police said he was unconscious and in need of medical treatment after consuming a large amount of the stolen narcotic in a suicide attempt. The suspect was taken to Maine Medical Center in Portland.

Police said the suspect has not been arrested yet but will probably be charged with robbery when he recovers. Police are withholding the suspect’s name.

The police said they are still investigating the incident. The suspect’s vehicle was seized and impounded for processing.