Lipitor is a prescription medication that is used to treat high cholesterol levels in the blood. The active ingredient in Lipitor is atorvastatin, which belongs to a class of drugs called statins. According to Drug Patent Watch [1], the patent for Lipitor expired in 2011, which means that generic versions of the drug are now available.

The CNN article [2] discusses a study that examined the side effects of statins, including Lipitor. The study found that muscle pain and weakness were the most common side effects reported by patients taking statins. However, the article notes that these side effects are usually mild and go away on their own after a few weeks of taking the medication.

The Cleveland Clinic article [3] provides some potential fixes for muscle pain and weakness caused by statins. These include switching to a different statin medication, reducing the dose of the medication, taking the medication at a different time of day, or taking a supplement such as Coenzyme Q10. The article notes that patients should talk to their doctor before making any changes to their medication regimen.

Based on these sources, it is not clear how long after stopping Lipitor the side effects of the medication, such as muscle pain and weakness, will go away. However, the CNN article suggests that these side effects are usually mild and go away on their own after a few weeks of taking the medication. If a patient is experiencing persistent or severe side effects from Lipitor, they should talk to their doctor about potential solutions, such as switching to a different medication or reducing the dose.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.cnn.com/2017/07/24/health/statins-side-effects-outcomes-study/index.html
[3] https://health.clevelandclinic.org/statins-giving-you-achy-muscles-ask-your-doctor-about-these-4-potential-fixes/