Based on the available information, there is no evidence to suggest that probiotic use directly affects Lipitor (atorvastatin) effectiveness. Lipitor is a medication used to treat high cholesterol levels, while probiotics are live bacteria and yeasts that are beneficial for health, particularly the digestive system [1][2].

However, it is important to note that certain supplements, such as red yeast rice, can contain substances similar to atorvastatin, which could potentially interact with Lipitor and increase the risk of side effects [2]. Cranberry, on the other hand, is a supplement that is not known to interact with Lipitor [3].

It is always recommended to consult with a healthcare provider before starting any new supplements or medications, as individual responses and interactions can vary [2].

Sources:
[1] <https://www.drugpatentwatch.com/p/tradename/LIPITOR>
[2] <https://www.nhs.uk/medicines/atorvastatin/taking-atorvastatin-with-other-medicines-and-herbal-supplements/>
[3] <https://www.webmd.com/vitamins/ai/ingredientmono-958/cranberry>