Lipitor is a commonly prescribed medication used to lower cholesterol levels in the body [1]. While it is generally considered safe and effective, like all medications, it can cause side effects in some individuals. According to the Mayo Clinic, some of the most common side effects of Lipitor include muscle pain, weakness, and tenderness, as well as an increased risk of developing type 2 diabetes [2]. However, there is no direct evidence to suggest that Lipitor causes liver damage.

On the other hand, grapefruit juice has been shown to interact with a number of medications, including some statins like Lipitor [3]. This is because grapefruit juice contains compounds that can inhibit the activity of certain enzymes in the liver, which are responsible for breaking down and eliminating many drugs from the body. As a result, taking Lipitor with grapefruit juice can lead to higher levels of the drug in the bloodstream, which can increase the risk of side effects.

While there is no direct evidence to suggest that Lipitor causes liver damage, taking it with grapefruit juice can increase the risk of side effects, including liver damage. Therefore, it is generally recommended that individuals taking Lipitor avoid consuming grapefruit or grapefruit juice [2, 3].

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.mayoclinic.org/diseases-conditions/high-blood-cholesterol/in-depth/statin-side-effects/art-20046013
[3] https://www.fda.gov/consumers/consumer-updates/grapefruit-juice-and-some-drugs-dont-mix