Lipitor is a medication used to lower cholesterol levels in the body. It is a statin drug that works by blocking the production of cholesterol in the liver. According to Drug Patent Watch [1], the patent for Lipitor expired in 2011, which means that generic versions of the drug are available.

When taking Lipitor, patients should expect to see a reduction in their cholesterol levels within a few weeks to a few months. According to the Cleveland Clinic [2], it may take up to four weeks for patients to see a significant decrease in their LDL cholesterol levels. However, the full effects of the medication may not be seen for several months.

It is important to note that the effects of Lipitor may vary depending on the individual. Some patients may see a significant decrease in their cholesterol levels within a few weeks, while others may take longer to see results. Additionally, lifestyle changes such as diet and exercise may also impact the effectiveness of the medication.

Patients should also be aware of the potential side effects of Lipitor, which may include muscle pain, liver damage, and an increased risk of diabetes. If patients experience any side effects while taking Lipitor, they should contact their healthcare provider immediately.

In summary, patients taking Lipitor should expect to see a reduction in their cholesterol levels within a few weeks to a few months. However, the full effects of the medication may not be seen for several months. Patients should also be aware of the potential side effects of Lipitor and contact their healthcare provider if they experience any adverse reactions.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://health.clevelandclinic.org/what-you-should-expect-from-statin-therapy/
[3] https://www.health.harvard.edu/staying-healthy/when-to-expect-results-from-a-new-medication