WAUSAU — A Marathon man who told police he was driving home from a methadone clinic appointment is facing his fifth charge of operating while intoxicated, according to court documents.

Andrew Westberg, 28, is being held in the Marathon County Jail on a $2,000 cash bond.

Police were called at 10:33 a.m. May 10 for a report of an erratic driver on Stewart Avenue who pulled in and out of various parking lots and was driving with arms “flailing out of the window,” court documents state. A witness followed the driver, later identified as Westberg, until an officer could respond.

When officers located his vehicle, Westberg had exited the car and was “pacing” in the parking lot of a medical supply store, sweating profusely, according to the police report. When interviewed, Westberg allegedly told police he had come from a clinic in downtown Wausau where he had been given his daily dose of methadone and was en route back to his home in Marathon.

A preliminary breath test showed Westberg did not have any alcohol in his system, but officers arrested him after field sobriety tests indicated drug impairment, court documents show. Police say Westberg later admitted snorting two 30-mg. pills of Adderall the night before. Adderall has a half life of about 10 hours, according to the National Council on Alcoholism and Drug Dependence.

Westberg’s four prior OWI convictions happened in 2009, 2010, 2013 and 2015. Police say he was driving with an occupational license at the time of his arrest.

A preliminary hearing is set for May 21.