Lipitor, also known as atorvastatin, is a medication used to lower cholesterol levels and prevent cardiovascular disease [1]. One of the common side effects of this medication is muscle pain, also known as myalgia. According to GoodRx [2], myalgia can occur during the first few weeks of taking Lipitor or after taking the medication for an extended period. The severity of muscle pain varies from person to person, and it can range from mild discomfort to severe pain that interferes with daily activities.

Stopping exercise while taking Lipitor can also contribute to muscle pain. WebMD [3] suggests that exercising regularly while taking Lipitor can help reduce the risk of muscle pain. Exercise can help strengthen the muscles and reduce the risk of muscle injury. However, if muscle pain does occur, it is recommended to stop exercising and rest until the pain subsides.

It is unclear from the sources provided how long after stopping exercise the muscle pain associated with Lipitor returns. It is important to note that the severity and duration of muscle pain can vary from person to person. If muscle pain persists or becomes severe, it is recommended to consult a healthcare provider.

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.webmd.com/cholesterol-management/statins-managing-muscle-pain