Lipitor is a brand name for the drug atorvastatin, which is used to lower cholesterol levels in the blood. There is no information in the provided sources that suggests that Lipitor interacts with inversions.

The first source, Drug Patent Watch, provides information on the patent status of Lipitor and its generic versions. The website lists the active and expired patents for the drug, but does not mention anything about inversions or how Lipitor interacts with them.

The second source, a New York Times article from 2015, discusses proposed rules by the Treasury and IRS to curb corporate inversions, which is a tax strategy where a company relocates to a foreign country with lower tax rates. The article does not mention Lipitor or any other drugs.

The third source, a Reuters article from 2015, reports on Pfizer's failed attempt to merge with Allergan and relocate to Ireland for tax purposes. Again, there is no mention of Lipitor or any other drugs.

In conclusion, based on the provided sources, there is no information to suggest that Lipitor interacts with inversions. Lipitor is a drug used to lower cholesterol levels in the blood, and its patent status is listed on the Drug Patent Watch website. The other two sources discuss proposed rules to curb corporate inversions and Pfizer's failed attempt to merge with Allergan, but do not mention Lipitor or any other drugs.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.nytimes.com/2015/11/20/business/dealbook/treasury-and-irs-propose-rules-to-curb-corporate-relocations-for-tax-reasons.html
[3] https://www.reuters.com/article/idUS29658586520151228