Lipitor (atorvastatin) is a medication used to lower cholesterol levels in the blood. Amlodipine is a medication used to treat high blood pressure. According to the sources provided, there are potential interactions between Lipitor and amlodipine.

The first source, Drug Patent Watch [1], provides information on the patent status of Lipitor. It does not provide any information on drug interactions.

The second source, GoodRx [2], provides information on potential drug interactions between Lipitor and amlodipine. According to GoodRx, taking Lipitor with amlodipine may increase the risk of muscle pain or weakness, as well as an increased risk of developing diabetes. GoodRx recommends that patients taking both medications should be monitored closely by their healthcare provider.

The third source, Mayo Clinic [3], provides information on precautions to take when taking amlodipine and atorvastatin (Lipitor) together. According to Mayo Clinic, taking both medications together may increase the risk of muscle problems, such as myopathy or rhabdomyolysis. It is important to monitor for any signs of muscle pain, weakness, or tenderness. Patients taking both medications should also be monitored for signs of liver problems, as both medications can affect liver function.

In conclusion, Lipitor may interact with amlodipine and increase the risk of muscle pain or weakness, as well as an increased risk of developing diabetes. Patients taking both medications should be closely monitored by their healthcare provider for signs of muscle problems and liver problems.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.goodrx.com/paxlovid/drug-interactions
[3] https://www.mayoclinic.org/drugs-supplements/amlodipine-and-atorvastatin-oral-route/precautions/drg-20062902?p=1