Whoops...I was actually hoping you didn't when I typed that reply. You might want to Google it. Something about grapefruit (an enzyme?), IIRC, that makes Lipitor collect in high doses in the liver (and I'm guessing your liver doesn't need that kind of help).
Wait...OK, I can Google, too. Might want to take a look at this. My memory of the specific problem was sort of in the right neighborhood. Bad to mix the two, even juice.
http://cholesterol.emedtv.com/lipitor/lipitor-and-grapefruit.html
Another site says:
"Lipitor and grapefruit juice don’t mix. Grapefruit juice inhibits a substance in your small intestine that helps break down dozens of medications, including Lipitor (atorvastatin). If you drink grapefruit juice while taking Lipitor, too much of the medication may enter your blood stream. This could result in side effects such as a dangerous muscle disorder or liver damage."
That's why, last time Mrs. Pacman served me up some grapefruit one weekend, I asked if she was tired of trying to kill me slowly and wanted to just finish the job. She didn't know either.
Or so she SAYS!
But wait a minute...turns out it interacts with other drugs, too.
http://www.cbsnews.com/stories/2005/01/20/health/webmd/main668105.shtml
Hey...drink some grapefruit juice and you get an extra high from Xanax? Well, if the Lipitor reaction doesn't kill you, perhaps.