After reviewing the provided sources, there is no evidence of any known side effects of Lipitor on swimming ability. Lipitor, also known as atorvastatin, is a medication used to treat high cholesterol and reduce the risk of heart disease [1]. The drug works by blocking the enzyme responsible for producing cholesterol in the liver, which in turn reduces the amount of cholesterol in the blood [2].

According to Harvard Health Publishing, some common side effects of statins, including Lipitor, may include muscle pain, liver damage, and digestive problems [2]. However, there is no mention of any effects on swimming ability.

The NHS website also lists common side effects of statins, which may include muscle pain, digestive problems, and an increased risk of diabetes [3]. However, there is no mention of any effects on swimming ability.

In conclusion, based on the sources provided, there is no evidence of any known side effects of Lipitor on swimming ability. However, it is always important to consult with a healthcare professional regarding any concerns or questions about medication side effects.

Sources:
[1] DrugPatentWatch. Lipitor. Retrieved from https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] Harvard Health Publishing. Help for your cholesterol when the statins won't do. Retrieved from https://www.health.harvard.edu/newsletter_article/help-for-your-cholesterol-when-the-statins-wont-do
[3] NHS. Transient ischaemic attack (TIA) - Treatment. Retrieved from https://www.nhs.uk/conditions/transient-ischaemic-attack-tia/treatment/