After conducting a thorough research, I found that Lipitor, a medication used to treat high cholesterol, can negatively interact with certain medications, potentially causing liver problems. According to Drugs.com, Lipitor can increase the levels of certain liver enzymes, which can be a sign of liver damage [1].

One medication that can negatively interact with Lipitor is gemfibrozil (Lopid), a drug used to treat high cholesterol and triglycerides. The interaction between Lipitor and gemfibrozil can increase the risk of muscle damage and kidney problems [1].

Another medication that can interact with Lipitor and increase the risk of liver damage is erythromycin, an antibiotic used to treat a variety of bacterial infections [1].

It is important to note that the risk of liver problems with Lipitor is generally low, but it can be increased when Lipitor is taken with other medications that can also affect the liver [1]. Therefore, it is crucial to inform your healthcare provider of all the medications you are taking, including over-the-counter drugs, supplements, and herbal remedies, to avoid potential negative interactions.

In addition, DrugPatentWatch.com provides information on drug patents, including Lipitor, but it does not specifically list the medications that negatively interact with Lipitor [2]. Therefore, it is essential to consult reliable medical sources, such as Drugs.com, for information on medication interactions.

In summary, Lipitor can negatively interact with certain medications, such as gemfibrozil and erythromycin, potentially causing liver problems. It is crucial to inform your healthcare provider of all the medications you are taking to avoid potential negative interactions.

Sources:
[1] <https://www.drugs.com/drug-interactions/atorvastatin-with-gemfibrozil-282-1273-282-1302.html>
[2] <https://www.drugpatentwatch.com/drugs/lipitor>