Khloe Kardashian and her husband of nearly four years, NBA player Lamar Odom, have separated -- and it's for seriously dire reasons. Odom is reportedly addicted to crack cocaine and possibly prescription drugs.

TMZ reports that Kardashian unofficially filed for separation from Odom, who has allegedly been addicted to drugs for at least two years, when she threw him out of their house.

The move comes after a rumored intervention for Odom that failed; Kardashian told him if he didn't get help, she wanted nothing to do with him anymore. Sources say, though, that Kardashian's main goal isn't to split -- it's to save her husband. Neither Odom nor Kardashian has consulted a divorce lawyer, but it wouldn't matter too much anyway because they have a rock solid prenup.

Sources tell TMZ that Odom has gone off the rails since he became a free agent; he previously entered rehab for three weeks last year.

As of yesterday, those close to Odom couldn't find him, but his rep insisted he was fine.

What's more? Kardashian thinks Odom has been cheating and that drugs played a role in his infidelity.

Best wishes to Odom on a speedy recovery -- we love these two together and hope they can work it out!

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