Dennis Quaid dishes about his former cocaine addiction and Hollywood in a candid piece for Newsweek out this week. “My greatest mistake was being addicted to cocaine,” says Quaid, pulling no punches about his drug abuse and what he claims is its role in show business. Quaid says that when he arrived in Los Angeles in 1972, the booger sugar was “even in the budgets of movies, thinly disguised” and used as “petty cash” in Tinseltown. Success only accelerated his descent. “Doing blow just contributed to me not being able to handle all that fame, which, at the time, I guess I felt I didn’t deserve,” he writes. He says he cultivated a reputation for being a “bad boy” — “I’d wake up, snort a line, and swear I wasn’t going to do it again that day . . . meanwhile, my life was falling apart,” he says. The piece then follows his dramatic recovery in the ’90s.