Lindsay Lohan's attorney has slammed reports the actress has threatened to quit her court-ordered rehab stint if she is banned from taking her prescription medication.

The Liz & Dick star is due to begin a 90-day stay in a treatment center by May 2nd but several reports have suggested the 26 year old is refusing to stop taking Adderall, a stimulant used to treat attention deficit hyperactivity disorder. Although, they can also be mistreated by people who want to stay thin or get high.

Nevertheless, Lohan's lawyer Mark Heller is adamant his client will be taking rehab seriously.

He tells the New York Post's gossip column Page Six, "She has not, nor would she be poised to, mandate any type of requirements. Nor has she directed me (to find a facility that permits) her to use any types of substances such as Adderall. She has to conform and comply with the (center's) requirements."

Heller also dispelled speculation Lohan has already decided where she will undergo treatment, admitting the actress is considering five different clinics across the country.

He adds, "Lindsay is expected to sit with me this week... and then a final approval has to be rendered by the court."

Despite all of her ongoing personal problems, Lindsay was still able to attend the Coachella music festival in California over the weekend.