According to E! News, Efron, 25, entered a treatment facility five months and after completing a full stint is now focused on his acting career.
"He's healthy, happy and not drinking," a source told the website.
"He's taking time to focus on working."
The former boyfriend of Vanessa Hudgens, Efron easily made the leap from Disney to the big screen and is filming three movies for 2014 release: Are We Officially Dating? Neighbors and Autobahn.