Based on the information available, it is not explicitly stated that elderly patients are more sensitive to Lipitor's effects. However, it is a general understanding in the medical field that elderly patients may have different responses to medications due to various factors such as changes in body composition, kidney and liver function, and the presence of other health conditions [1].

Lipitor (atorvastatin) is a medication used to treat high cholesterol levels. Like other statins, it works by blocking the action of a certain enzyme in the body (HMG-CoA reductase) that is needed to make cholesterol [2].

According to DrugPatentWatch.com, Lipitor was first approved by the FDA in December 1996 and its patent expired in November 2011 [3]. Since then, generic versions of atorvastatin have become available on the market.

It is important to note that elderly patients may require lower doses of Lipitor due to the potential for increased drug exposure and the risk of adverse effects [1]. Therefore, healthcare providers should consider age-related factors when prescribing Lipitor to elderly patients.

In conclusion, while there is no specific information indicating that elderly patients are more sensitive to Lipitor's effects, it is important for healthcare providers to consider age-related factors when prescribing this medication to elderly patients.

Sources:
[1] <https://www.ncbi.nlm.nih.gov/books/NBK557895/>
[2] <https://medlineplus.gov/druginfo/meds/a601204.html>
[3] <https://www.drugpatentwatch.com/drugs/lipitor>