According to the sources provided, there is no evidence of any significant interaction between Lipitor (atorvastatin) and glucosamine. Lipitor is a statin medication that is used to lower cholesterol levels in the body, while glucosamine is a dietary supplement that is often used to manage joint pain and stiffness.

DrugPatentWatch [1] provides information on the patent and exclusivity status of Lipitor. It does not provide any information on the interaction between Lipitor and glucosamine.

Drugs.com [2] has a drug interaction checker that allows users to check for potential interactions between medications and supplements. According to the website, there are no known interactions between amlodipine-atorvastatin (Lipitor) and glucosamine-chondroitin with MSM. However, it is always important to consult with a healthcare provider before taking any new medications or supplements, especially if you have any underlying medical conditions or are taking other medications.

ConsumerLab [3] provides information on which drugs should be avoided when taking statins. While the article does not specifically mention glucosamine, it notes that certain supplements, such as red yeast rice, can interact with statins and increase the risk of side effects. However, there is no mention of any interaction between Lipitor and glucosamine.

In conclusion, based on the sources provided, there is no evidence of any significant interaction between Lipitor and glucosamine. However, it is always important to consult with a healthcare provider before taking any new medications or supplements.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.drugs.com/drug-interactions/amlodipine-atorvastatin-with-glucosamine-chondroitin-with-msm-173-0-655-14129.html
[3] https://www.consumerlab.com/answers/which-drugs-should-be-avoided-when-taking-statins/statin-supplement-interactions/