Zac Efron Battled Coke Addiction for Two Years?

Zac Efron has been in rehab twice this year for an addiction to coke, TMZ reported Thursday.

Sources told the entertainment site that the 25-year-old has been in the throes of a serious addiction to coke. Allegedly, he has been doing coke for more than two years and in March he tried to get help. However, he relapsed while shooting the movie Neighbors. He would go missing for days. After the film was completed, he made the decision to seek out patient care.

Sources also gave reason as to why the star would start using drugs. One reason cited was the state of his career.  Efron's movie career has faltered since he starred in High School Music and it was also mentioned by sources that he has been fighting with his problems over his life and their control over it. There have also been issues with women.  He used to date co-star Vanessa Hudgens but sources said that there were no lingering feelings.

PEOPLE also reported on Efron's partying lifestyle in an article published Thursday. He has been quiet different from his reserved persona at various nightclubs.

"He surrounds himself with a group that enjoys partying," an Efron said. "He got caught up in the partying lifestyle the past few years."