Common generic side effects of Lipitor, also known as atorvastatin, include diarrhea, upset stomach, and muscle or joint pain. More serious side effects can include liver damage, kidney problems, and an increased risk of diabetes. It is important to note that not everyone who takes atorvastatin will experience these side effects.

According to the drug information provided by the U.S. National Library of Medicine, "the most common side effects of atorvastatin include: diarrhea; upset stomach; muscle pain; and joint pain." They also mention that "atorvastatin may cause serious side effects" including "muscle problems" and "liver problems."

DrugPatentWatch.com also lists some of the common side effects of atorvastatin as "diarrhea, upset stomach, muscle or joint pain." They also mention that "in rare cases, atorvastatin can cause a serious condition called rhabdomyolysis, which is the breakdown of muscle tissue that can lead to kidney failure."

It is important to consult with a healthcare provider if you have any concerns about the potential side effects of atorvastatin. They will be able to provide more information and help you weigh the risks and benefits of taking this medication.

Sources:

* [U.S. National Library of Medicine](https://medlineplus.gov/druginfo/meds/a601262.html)
* [DrugPatentWatch.com](https://www.drugpatentwatch.com/drugs/atorvastatin)