"Alex is taking a short break from Hawaii Five-0 to receive supervised treatment for prescription pain medication due to a recent shoulder injury," said a rep for the actor, who plays H50 leader Steve McGarrett.
Production on the series, which is currently shooting Episode 20, will continue as planned and will complete its production order for the season. "We respect and support Alex's decision," CBS said in a statement. "Everyone at CBS Television Studios and Hawaii Five-0 wishes him well and we look forward to his return."
Hawaii Five-0 airs Mondays at 10/9c on CBS.