Lipitor is a brand name for the drug atorvastatin, which is a medication used to lower cholesterol levels in the body. According to Drug Patent Watch [1], there is no mention of any limit on the consumption of grapefruit juice or any other juice while taking Lipitor. However, it is important to note that grapefruit juice can interact with some statins, including atorvastatin, and increase the risk of side effects. As per Harvard Health Publishing [2], grapefruit juice contains compounds that can interfere with the enzymes that break down atorvastatin in the body, leading to higher levels of the drug in the bloodstream. This can increase the risk of side effects, such as muscle pain and liver damage. Therefore, it is recommended that people taking Lipitor avoid drinking grapefruit juice or limit their intake to no more than 1 quart per day. Additionally, the British Heart Foundation [3] recommends limiting the intake of free sugars, which are sugars added to food and drinks, to no more than 30g per day for adults. This includes fruit juice, which contains natural sugars but is still considered a source of free sugars.

In conclusion, there is no specific limit on the consumption of juice while taking Lipitor, according to Drug Patent Watch. However, it is recommended to limit the intake of grapefruit juice to no more than 1 quart per day to avoid potential interactions with the drug, as advised by Harvard Health Publishing. Additionally, the British Heart Foundation recommends limiting the intake of free sugars, including fruit juice, to no more than 30g per day. It is always best to consult with a healthcare provider for personalized advice on medication and dietary restrictions.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.health.harvard.edu/heart-health/grapefruit-juice-and-statins
[3] https://www.bhf.org.uk/informationsupport/heart-matters-magazine/nutrition/sugar-salt-and-fat/free-sugars