It's been over a week since Lindsay Lohan's doctors cut off her Adderall supply and, consequently, she began carving a tunnel through the wall of her room at the Betty Ford clinic with a spoon.

Now she's vowing to stock up on the drug the second she leaves. Hopefully the good folks at Walgreens carry riot gear.

A source tells RadarOnline that Linds has been a "bitch on wheels" since being deprived of her sweet, sweet Addy.

“Lindsay is hell bent on getting a refill of her Adderall as soon she leaves Betty Ford. The medication she has been taking for her ADD isn’t working, and she’s constantly complaining about it. Lindsay doesn’t care what the doctors at Betty Ford say about the dangers of Adderall," the insider said.

The source also expressed fear of relapse, saying "[Lindsay] has no chance of staying sober if she starts taking the Adderall again" because an amphetamine like that may trigger an urge to use other drugs. (Another apparent trigger to using other drugs? Being Lindsay Lohan.)

Of course, Linds claims she needs the Addy because she has Attention Deficit Disorder. Her doctors at Betty Ford disagree, but hey -- what do they know?