Based on the information available, there is no direct evidence to suggest that Lipitor, a medication used to treat high cholesterol, causes issues while swimming. Lipitor is a statin, a type of drug that works by reducing the amount of cholesterol your body absorbs [1].

However, it's important to note that Lipitor, like many medications, can have side effects [1]. These can include muscle pain, liver damage, and kidney problems [1]. If you experience these side effects while swimming, they could potentially be exacerbated by the physical exertion and water exposure. Therefore, it's crucial to monitor how you feel before, during, and after swimming, and to consult with your healthcare provider if you have any concerns.

Furthermore, Lipitor is a prescription medication, and it's essential to follow your healthcare provider's instructions carefully when taking it [1]. This includes not stopping or changing your dosage without their guidance, as doing so could lead to complications [1].

In conclusion, while there's no specific evidence to suggest that Lipitor causes issues while swimming, it's always important to be aware of and monitor any potential side effects of your medication. If you have any concerns, you should consult with your healthcare provider.

Sources:
[1] DrugPatentWatch.com. (n.d.). Lipitor. Retrieved from https://www.drugpatentwatch.com/drugs/lipitor