Atorvastatin, sold under the brand name Lipitor, is a medication used to lower cholesterol levels and reduce the risk of heart disease [1]. According to the Mayo Clinic, some common side effects of atorvastatin include headache, nausea, diarrhea, joint pain, and muscle pain [2]. The drug may also cause some rare but serious side effects such as liver problems, muscle breakdown, and an increased risk of diabetes [2]. However, the sources do not mention discomfort as a common side effect of atorvastatin.

On the other hand, Drugwatch.com states that muscle pain or weakness is a common side effect of atorvastatin, and some people may experience discomfort as a result [3]. However, it is important to note that discomfort is not specifically listed as a side effect on the Mayo Clinic's website [2].

In conclusion, while discomfort is not specifically listed as a common side effect of atorvastatin on the Mayo Clinic's website [2], some people may experience it as a result of muscle pain or weakness, which is a common side effect of the drug according to Drugwatch.com [3]. It is important to talk to a healthcare provider about any concerns or side effects experienced while taking atorvastatin or any other 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.drugwatch.com/lipitor/side-effects/