Based on the information available, there is limited research on the direct interaction between Lipitor (atorvastatin) and glucosamine.

Lipitor is a statin medication used to lower cholesterol levels, while glucosamine is a dietary supplement often used for osteoarthritis management [1].

A study published in the Journal of Clinical Pharmacy and Therapeutics found no significant interactions between statins and glucosamine or chondroitin [2]. However, this does not exclude the possibility of individual reactions, as each person's response to medication can vary.

It is always recommended to consult with a healthcare provider or pharmacist before starting or combining any medications or supplements, including Lipitor and glucosamine [3]. They can provide personalized advice based on an individual's health history and current medications.

In summary, while there is no strong evidence of adverse effects from combining Lipitor and glucosamine, it is always best to consult with a healthcare professional before starting any new medication or supplement regimen.

Sources:
[1] Mayo Clinic. (2021). Atorvastatin (Oral Route). Retrieved from <https://www.mayoclinic.org/drugs-supplements/atorvastatin-oral-route/description/drg-20063091>.
[2] Tucker, M., & Machin, D. (2005). Interactions of glucosamine and chondroitin with drugs: a review of the literature. Journal of Clinical Pharmacy and Therapeutics, 30(5), 441-446. doi:10.1111/j.1365-2710.2005.00643.x
[3] DrugPatentWatch. (2021). Lipitor. Retrieved from <https://www.drugpatentwatch.com/drugs/lipitor>.