In a statement on his official website, Sorrentino said he is seeking treatment "to get control of a prescription medication problem I had due to exhaustion."
"I have voluntarily taken steps to get control of a prescription medication problem I had due to exhaustion," he said.
"I have spent the past several weeks getting treatment for this problem and recuperating from my work and appearance schedule. I appreciate my fans support and love you guys."
"Jersey Shore" ended its fifth season this month, but MTV has renewed the show for a sixth year.