The recommended amount of grapefruit oil to be used with Lipitor, a medication used to treat high cholesterol, is not explicitly specified in the available information. However, it is important to note that consuming grapefruit or grapefruit juice while taking Lipitor can have serious health consequences [1].

Grapefruit and its juice can interact with Lipitor (atorvastatin) and other statin drugs, leading to increased levels of the medication in the bloodstream. This can increase the risk of side effects, including muscle damage and kidney problems [1][2].

While grapefruit oil may not have the same impact as consuming the fruit or its juice, there is limited research on the effects of grapefruit oil specifically when taken with Lipitor. Therefore, it is advisable to err on the side of caution and avoid using grapefruit oil while taking Lipitor [1].

It is crucial to consult with a healthcare provider or pharmacist before using any complementary therapies, such as essential oils, while taking prescription medications like Lipitor [1].

Sources:

[1] DrugPatentWatch.com. (2022). Grapefruit and Lipitor: What You Need to Know. Retrieved from <https://www.drugpatentwatch.com/blog/grapefruit-and-lipitor-what-you-need-to-know/>

[2] Mayo Clinic. (2021). Grapefruit juice and some drugs don't mix. Retrieved from <https://www.mayoclinic.org/healthy-lifestyle/nutrition-and-healthy-eating/in-depth/grapefruit-juice/art-20047145>