LOS ANGELES: Zac Efron reportedly first sought professional help for his addiction in March this year. Earlier this week, reports emerged that the former High School Musical star had completed a stint in a facility due to alcohol issues. However, it was then claimed Zac had been treated for a “serious” cocaine problem.  TMZ is now reporting that the 25-year-old had already received treatment in March and sought professional help for a second time after relapsing while shooting Neighbors. “Zac has been doing cocaine for more than two years but tried to clean himself up in March ...” according to the website. –GN