Two drugs will be allowed to appear in Lindsay Lohan's system when she undergoes random drug testing in the coming weeks as part of a sentence handed down by a judge stemming from her 2007 DUI arrest, according to Advocate.com.

Judge Marsha Revel has allowed Lohan to continue taking the prescription drugs Adderall (which is used to treat ADHD) and Ambien because they are doctor prescribed.

But friends close to the actress suggest Lohan's major problem is with prescription drugs, and the testing as currently set up is unlikely to help her kick the habit.

On Tuesday it was also revealed Lohan that lied in court when she said she was needed on the set of a film shooting in Texas. Lohan has a small role in the film Machete, but director Robert Rodriguez said the reshoots taking place in May and June don't include the actress.

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