Lipitor is a medication used to lower cholesterol levels in the blood. There is no evidence to suggest that doing inversions, a yoga pose that involves being upside down, is unsafe while taking Lipitor.

According to Drug Patent Watch [1], Lipitor's active ingredient is atorvastatin, which works by inhibiting an enzyme that produces cholesterol in the liver. Lipitor is generally well-tolerated by patients, but like any medication, it can have side effects. The most common side effects of Lipitor include muscle pain and weakness, nausea, and diarrhea.

The New York Times [2] reports that the US Treasury and IRS have proposed rules to curb corporate relocations for tax reasons. This article is not relevant to the question about Lipitor and inversions, so we will move on to the next source.

A study published in the US National Library of Medicine [3] examined the effects of atorvastatin on skeletal muscle function and found that the drug did not impair muscle performance or cause muscle damage. The study concluded that atorvastatin was safe and well-tolerated by patients.

In conclusion, there is no evidence to suggest that doing inversions while taking Lipitor is unsafe. However, as with any exercise program, it is important to consult with a healthcare provider before starting a new routine. If a patient experiences any adverse effects while taking Lipitor, they should contact their healthcare provider immediately.

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.ncbi.nlm.nih.gov/pmc/articles/PMC3070374/