Lipitor is a medication used to lower cholesterol levels in the blood. One of the side effects of Lipitor is muscle pain, which can be experienced by some patients taking the medication. According to GoodRx [2], muscle pain is a common side effect of statins, including Lipitor, and can occur in up to 10% of patients. The Health Harvard [3] advises that most people who experience muscle pain while taking Lipitor should start to feel better within a few weeks after stopping the medication. However, the duration of muscle pain can vary from person to person, and some patients may experience muscle pain for several months.

The Drug Patent Watch [1] provides information on the expiration of the Lipitor patent. It does not provide information on the duration of muscle pain associated with the medication.

In conclusion, the duration of muscle pain associated with Lipitor can vary from person to person. While most people should start to feel better within a few weeks after stopping the medication, some may experience muscle pain for several months. Patients who experience muscle pain while taking Lipitor should consult with their healthcare provider to determine the best course of action.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.goodrx.com/classes/statins/muscle-pain-statins-how-to-prevent-common-side-effect
[3] https://www.health.harvard.edu/pain/managing-statin-muscle-pain