Brendon, 48, said in a statement posted on his Facebook page that he had mixed alcohol and prescription medication taken to manage pain for a cyst behind his knee cap.
"I regret disappointing my family, my fans and myself," Brendon said. "I intend to seek appropriate treatment and therapy for my medical ailments as well as my emotional demons."
Brendon, best known for starring in the cult hit "Buffy" as Xander Harris alongside of Sarah Michelle Gellar from 1997 to 2003, was charged with malicious injury to property and resisting or obstructing Boise police officers on October 17, according to an Ada County police report.
Media reports said Brendon was in town to attend a comics convention and got into a drunken dispute with hotel staff and broke a decorative item.
Brendon has also starred on "Criminal Minds" and "Private Practice," among other television series.
