Charlie Sheen's Ex-Wife Goes Back Into Rehab UPI, TMZ

Just a day after claiming that she was clean and sober, as we reported previously, Charlie Sheen's ex-wife Brooke Mueller has returned to a drug rehabilitation facility, reports

Her attorney confirmed that she is undergoing treatment for drug addiction. She reportedly checked in Monday night.

This is Mueller’s latest in a series of stints in rehab -- reports that she has now entered treatment facilities 19 times.

Yale Galanter, Mueller's attorney, told TMZ, "Brooke was uncomfortable with the way Adderall was making her behave." Adderall, a prescription medication, is a psycho-stimulant.