A Portland physician assistant has had his license put on probation for five years after showing up for work in an emergency department with morphine in his system, according to state regulators.

The Board of Licensure in Medicine entered into a consent agreement with Bruce Manley after he took a medication prescribed to a relative then came to work with the substance still in his system, according to a release from the board issued Monday.

The board reprimanded Manley and ordered him to pay a $1,000 fine.

Manley was being monitored for substance abuse by the Maine Medical Professionals Health Program and tested positive for morphine on April 27, according to board documents. The documents do not identify his employer, which fired him in August after the positive drug test.

When the board contacted Manley about the complaint, he said he had enrolled in a residential treatment program.

Manley’s probation requires that he abstain from drugs and participate in the Medical Professional Health Program.

Manley was first issued a license to practice medicine by Maine in 1998.

The board will notify national databanks of the discipline and Manley must alert any potential employer to the sanction.