According to the sources provided, there is a potential for interaction between Tylenol (acetaminophen) and Lipitor (atorvastatin). Tylenol is a common pain reliever and fever reducer, while Lipitor is a medication used to lower cholesterol levels.

The Drug Patent Watch [1] lists Tylenol as containing acetaminophen, which is metabolized in the liver by the CYP450 enzyme system. Lipitor is also metabolized by this same enzyme system. When two drugs are metabolized by the same enzyme system, there is a potential for drug-drug interactions.

Drugs.com [2] also notes that there is a moderate interaction between Tylenol and Lipitor. Taking these two medications together may increase the risk of liver damage. This is because both medications are metabolized by the liver and can cause liver toxicity when taken in excess or in combination with other medications that are metabolized by the liver.

The National Center for Biotechnology Information [3] notes that there have been reports of liver damage in patients taking both Tylenol and Lipitor together. The risk of liver damage may be higher in patients who have pre-existing liver disease or who drink alcohol regularly.

In conclusion, there is a potential for interaction between Tylenol and Lipitor, and patients should be cautious when taking these medications together. It is important to speak with a healthcare provider before taking any new medications, including over-the-counter medications like Tylenol. Patients should also follow the recommended dosages for each medication and avoid taking more than the recommended amount.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/TYLENOL
[2] https://www.drugs.com/drug-interactions/atorvastatin-with-tylenol-276-0-11-12.html
[3] https://www.ncbi.nlm.nih.gov/books/NBK548162/