By Jen Heger - Breaking Celebrity News Legal Editor

Charlie Sheen’s ex-wife, Brooke Mueller,  has entered a residential treatment facility, and it's not in Mexico, but rather, it’s in the United States, Breaking Celebrity News has exclusively learned.

Mueller had planned on going to Mexico to undergo treatment with the controversial drug Ibogaine to stop her cravings for illegal drugs. Ibogaine is classified as a hallucinogenic, and it’s illegal in the U.S.

Brooke had gone to LAX twice in the past week to go to Mexico, but the first time she got in a fight with United Airlines flight attendant and got off the plane before it left the gate, and the second time, she wasn't allowed to board because she didn't have her passport with her.

Sources close to Mueller tell Breaking Celebrity News: "She was convinced that was a sign to not go to Mexico. Brooke was aware that Ibogaine is a very dangerous drug to take, and could potentially do more harm than good for her."