Lipitor, also known as atorvastatin, is a medication used to lower cholesterol levels in the body. According to the sources provided, the time it takes for Lipitor to work can vary depending on the individual and the severity of their condition.

Drugpatentwatch [1] explains that Lipitor can take up to two weeks to start working and up to four weeks to reach its full effect. However, some patients may see results sooner. It is important to note that Lipitor is not a quick fix and should be taken consistently over time to see long-term benefits.

Drugwatch [2] notes that some patients may see a reduction in their cholesterol levels within a few days of starting Lipitor. However, it is important to continue taking the medication as prescribed to maintain these results.

Healthline [3] states that Lipitor is usually taken once a day, with or without food. It is important to follow the dosage instructions provided by a healthcare professional to ensure the medication is effective and safe.

In summary, the sources suggest that Lipitor can take up to two weeks to start working and up to four weeks to reach its full effect. However, some patients may see results sooner. It is important to continue taking Lipitor as prescribed to maintain its benefits.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.drugwatch.com/lipitor/
[3] https://www.healthline.com/health/drugs/lipitor