Lipitor is a brand name for the drug atorvastatin, which is a type of medication known as a statin. Statins are used to lower cholesterol levels in the blood and reduce the risk of heart disease [1]. According to a study published in the Journal of the American College of Cardiology, statins have been shown to have few side effects and are generally well-tolerated by patients [2]. However, like any medication, Lipitor can cause side effects, and it is important to be aware of these potential risks.

The most common side effects of Lipitor include muscle pain, weakness, and tenderness. These symptoms can occur after exercise and are more likely to occur in people who are taking higher doses of the medication or who have pre-existing muscle conditions [2]. In rare cases, Lipitor can cause a serious condition called rhabdomyolysis, which is the breakdown of muscle tissue that can lead to kidney damage [3]. Other potential side effects of Lipitor include liver problems, memory loss, and confusion.

It is not clear from the sources provided whether taking Lipitor after a workout specifically can increase the risk of side effects. However, it is generally recommended that Lipitor be taken at the same time each day, with or without food [1]. If you are experiencing any side effects from Lipitor, it is important to talk to your doctor, who may recommend adjusting your dosage or switching to a different medication.

In conclusion, while Lipitor is generally considered safe and well-tolerated, it can cause side effects such as muscle pain and weakness. It is important to be aware of these potential risks and to talk to your doctor if you experience any symptoms. It is also important to take Lipitor as directed and to not make any changes to your dosage without first consulting your doctor.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3463373/
[3] https://www.cnn.com/2017/07/24/health/statins-side-effects-outcomes-study/index.html