Thanks to an Adderall addiction, Brooke Mueller, better known as Charlie Sheen's third ex-wife, is back in rehab for the 19th time.

No, that's not a typo.

Yale Galanter, Brooke's lawyer, says Mueller entered treatment for the ADD medication because she "was uncomfortable with the way Adderall was making her behave" and that she "continues her lifelong battle with drug addiction by taking these steps herself to prevent a further drug relapse."

Her hospital visit on Dec. 7 was related to an overdose of the prescription medication, even though her rep denied it at the time by saying she was simply "exhausted" and "dehydrated." Which wasn't a total lie because popping pills will do that to you.

Mueller was in treatment this summer and in early 2012 stemming from a drug arrest in Aspen, Colo. One of the conditions of her resulting probation was that she not drink alcohol, but even though she had a little in her bloodstream when she arrived at the hospital, her lawyer doesn't think it'll be an issue.

Brooke, the mother of Charlie's two youngest children, will remain in rehab for an “undetermined” period. And let's hope it takes this time. Because no one should have more rehab visits than there are holes in a round of golf.

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