Eminem "is in the hospital under doctors' care," his spokesperson said in a brief statement.

Four days after canceling the planned European leg of his Anger Management tour due to exhaustion, Eminem has begun treatment for a dependency on sleep medication, according to his label, Interscope Records.

Eminem "is in the hospital under doctors' care," his spokesperson said in a brief statement.

The European Anger Management leg, which was set to open Sept. 1 in Hamburg, was axed on Tuesday. Tour co-headliner 50 Cent is lining up make-up dates along the route, beginning Sept. 13 in Nottingham, England.