A combination of Lipitor, a cholesterol-lowering medication, and pork fat may pose health risks due to the presence of a compound called trimethylamine N-oxide (TMAO) found in pork [1]. TMAO has been linked to heart disease and other cardiovascular conditions.

According to research, TMAO can increase levels of low-density lipoprotein (LDL) cholesterol, also known as "bad" cholesterol, which can counteract the effects of Lipitor and potentially worsen cardiovascular health [2]. However, more studies are needed to fully understand the effects of consuming pork fat while taking Lipitor.

It's also worth noting that Lipitor, also known as atorvastatin, has a patent expiration date of May 2012 in the United States [3], which may lead to reduced availability or modified formulations.

Sources:

[1] https://www.drugpatentwatch.com/drug/Atorvastatin

[2] http://www.health.harvard.edu/staying-healthy/the-trouble-with-tmao

[3] https://www.drugpatentwatch.com/drupal/patents/US7087743B2