According to a source familiar with Lindsay’s case, methamphetamine and opiates are her “drugs of choice” and she will be treated at Morningside Recovery in Orange County for a meth addiction and a bi-polar disorder.

In fact, Morningside is a rehab that specializes in opiate and meth detox. Lindsay is set to report straight to rehab after getting released from the clink.

Lindsay’s attorney Shawn Chapman Holley says, “i have never seen any psych report concerning Ms. Lohan which references a ‘bi-polar’ diagnosis or an addiction to ‘methamphetamine.’ I think this is a total fabrication.”

One important note … it has been widely reported that Lindsay takes the prescription drug Adderall, which is an amphetamine. Experts in the field of rehab and addiction tell TMZ there is a difference between amphetamine and methamphetamine.

But not much.