Lipitor is a brand name for atorvastatin, which is a medication used to lower cholesterol levels in the blood. According to the sources provided, there are several common side effects associated with taking Lipitor/atorvastatin.

The first source [1] lists some of the most common side effects of atorvastatin, including headache, diarrhea, joint pain, and urinary tract infection. Additionally, the source notes that muscle and joint pain are common side effects of statins, including atorvastatin.

The second source [2] provides a more comprehensive list of side effects associated with atorvastatin. These side effects include headache, nausea, diarrhea, constipation, and stomach pain. Additionally, the source notes that atorvastatin can cause muscle and joint pain, as well as an increased risk of developing type 2 diabetes.

The third source [3] provides a similar list of common side effects associated with atorvastatin, including headache, diarrhea, and muscle pain. The source also notes that atorvastatin can cause liver problems in rare cases.

It is important to note that while these side effects are common, not everyone who takes atorvastatin will experience them. Additionally, some people may experience more severe side effects or allergic reactions to the medication. Therefore, it is important to speak with a healthcare provider if you have any concerns about taking atorvastatin.

In conclusion, common side effects of Lipitor/atorvastatin include headache, diarrhea, joint pain, and muscle pain. It is important to speak with a healthcare provider if you have any concerns about taking this medication.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.mayoclinic.org/drugs-supplements/atorvastatin-oral-route/side-effects/drg-20067003
[3] https://www.nhs.uk/medicines/atorvastatin/side-effects-of-atorvastatin/