Lindsay Lohan is not drug free at the Betty Ford Center, it has been revealed. Sources connected with the troubled star told TMZ.com that the rehab centre is allowing her to take the powerful drug, Adderall. The reason – she has an Rx and says she’s been diagnosed with Attention Deficit Hyperactivity Disorder. Lindsay has made it clear over the last month that she would only go to rehab if she’s allowed to take the med. But sources said that doctors at Betty Ford are currently evaluating the actress’ diagnosis and the efficacy of the drug. If doctors disbelieve her diagnosis or the usefulness of Adderall, they will cut her off. Adderall is commonly misused by lots of people, especially actresses, who take the drug to suppress their appetite.