There is no evidence to suggest that Lipitor affects dairy digestion. Lipitor is a medication used to lower cholesterol levels and prevent heart disease [1]. It works by blocking an enzyme that is responsible for producing cholesterol in the liver. It is not known to have any direct effect on the digestive system, including dairy digestion.

Milk thistle, on the other hand, is an herbal supplement that is sometimes used to improve liver function and aid digestion [2]. While there is some evidence to suggest that milk thistle may have beneficial effects on the liver, there is no conclusive evidence to support its use for improving digestion or specifically aiding in dairy digestion.

When it comes to foods to avoid during digestive problems, dairy products are often on the list [3]. This is because some people may have difficulty digesting lactose, the sugar found in milk and other dairy products. However, this is not related to the use of Lipitor.

In conclusion, there is no evidence to suggest that Lipitor affects dairy digestion. While milk thistle may have some benefits for liver function, there is no evidence to support its use for improving digestion or aiding in dairy digestion. Dairy products may be difficult to digest for some people, but this is not related to the use of Lipitor.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.webmd.com/digestive-disorders/milk-thistle-benefits-and-side-effects
[3] https://www.everydayhealth.com/digestive-health/diet/foods-to-avoid-during-digestive-problems/