According to the sources provided, generic Lipitor (atorvastatin) appears to be as effective as the brand-name version.

The first source, DrugPatentWatch, provides information on the patent status of Lipitor. It indicates that the patent for Lipitor expired in 2011, allowing other pharmaceutical companies to produce generic versions of the drug. This suggests that generic Lipitor contains the same active ingredient, atorvastatin, as the brand-name version.

The second source, a study published in the National Center for Biotechnology Information, examines the bioequivalence of generic atorvastatin to Lipitor. The study concludes that generic atorvastatin is bioequivalent to Lipitor, meaning it is absorbed and acts in the body in the same way as the brand-name drug.

The third source, Ro.co, provides a health guide that states generic Lipitor is just as effective as the brand-name version. It mentions that generic drugs must meet the same rigorous standards set by the FDA in terms of quality, safety, and effectiveness.

Based on these sources, it can be inferred that generic Lipitor is as effective as the brand-name version. However, it is important to note that individual responses to medication can vary, and it is always recommended to consult with a healthcare professional before making any changes to your medication regimen.

Sources:
[1] DrugPatentWatch: https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] National Center for Biotechnology Information: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4859299/
[3] Ro.co: https://ro.co/health-guide/generic-lipitor/