The charge was dropped Tuesday because Faustino's arrest May 12 was sufficient punishment for the disorderly intoxication charge, Linda Pruitt, a spokeswoman for the State Attorney's Office said.
Faustino still faces a misdemeanor charge of marijuana possession, punishable by up to a year in prison, Pruitt said. He has pleaded not guilty. Trial is scheduled for July.
Faustino's lawyer, Michael Rodriguez, downplayed the drug charge Wednesday, saying: "It's not the biggest charge in the world."
Police spotted Faustino, 33, and his 31-year-old wife, Andrea, at an intersection on May 11. Faustino reportedly tried to climb out the car window, then opened the door.
The actor tried to walk away when police confronted the couple; the officer smelled alcohol on Faustino's breath and found a plastic bag with a gram of marijuana in his pocket, police said.
Faustino was arrested, booked into Volusia County jail and released the same day on his own recognizance.
He filed for divorce in February from his wife in Los Angeles County Superior Court, citing irreconcilable differences.
"Married With Children" ran on the Fox network from 1987 to 1997.