Tori Spelling is threading dangerously as of late by mixing prescription drugs. A close friend of Tori Spelling's tells In Touch Weekly:

"[Tori]'s physically weak and hasn't been eating. She'll be going to rehab for depression and for all the medications she's been taking. She knows she needs help ... What she's doing is dangerous. Mixing Xanax and OxyContin for anxiety and medication for her migraines and an antidepressant is not working well for her," says the friend.

Tori has also been treated several times with the powerful narcotic, Dilaudid -- which can be up to nine times stronger than morphine. "Tori has always been able to rush to a hospital when she gets a massive migraine and plead that she needs Dilaudid -- she's done it for years," the insider claims.

She'd better tone it down a notch!