Lipitor is a brand name for the drug atorvastatin, which is used to lower cholesterol levels in the blood. According to Drugs.com [2], it takes approximately 77 hours (3.2 days) for atorvastatin to be eliminated from the body after the last dose. However, this may vary depending on factors such as age, kidney function, and other medications being taken.

It is important to note that stopping Lipitor abruptly can have adverse effects on cholesterol levels and should be done under the guidance of a healthcare provider. Additionally, Lipitor can cause side effects such as muscle pain, weakness, and liver problems [1][3]. If any of these symptoms occur, it is important to seek medical attention immediately.

In conclusion, it takes approximately 77 hours for atorvastatin to leave the system after the last dose. However, it is important to follow medical advice when stopping Lipitor and to be aware of potential side effects.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.drugs.com/medical-answers/long-atorvastatin-stay-system-after-stopping-drug-527313/
[3] https://www.singlecare.com/blog/lipitor-side-effects/