Based on the sources provided, there is no direct information indicating that Lipitor (atorvastatin) and glucosamine would affect each other's effectiveness. However, it is always important to consult with a healthcare professional or pharmacist before combining medications or supplements.

Lipitor is a medication used to lower cholesterol levels in the blood [1]. According to the National Health Service (NHS), there are no known interactions between atorvastatin and glucosamine [2]. This suggests that taking Lipitor and glucosamine together is generally safe.

Glucosamine is a dietary supplement commonly used to support joint health [3]. It is important to note that while glucosamine is generally well-tolerated, it may interact with certain medications, such as blood-thinning drugs [2]. However, there is no specific mention of an interaction with Lipitor.

It is also worth noting that the AARP mentions medications that can cause insomnia, and Lipitor is not listed among them [3]. This suggests that Lipitor is not likely to cause insomnia as a side effect.

In summary, based on the provided sources, there is no evidence to suggest that Lipitor and glucosamine would affect each other's effectiveness. However, it is always advisable to consult with a healthcare professional or pharmacist to ensure the safe and appropriate use of medications and supplements.

Sources:
[1] DrugPatentWatch. Lipitor. Retrieved from https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] NHS. Atorvastatin - Taking atorvastatin with other medicines and herbal supplements. Retrieved from https://www.nhs.uk/medicines/atorvastatin/taking-atorvastatin-with-other-medicines-and-herbal-supplements/
[3] AARP. Medications That Can Cause Insomnia. Retrieved from https://www.aarp.org/health/drugs-supplements/info-04-2013/medications-that-can-cause-insomnia.html