Lipitor, also known as atorvastatin, is a medication used to lower cholesterol levels in the blood [1]. Fish oil, on the other hand, is a dietary supplement that contains omega-3 fatty acids that are beneficial for heart health [2].

According to ConsumerLab, taking statin drugs such as Lipitor does not negate the benefits of taking fish oil supplements [2]. However, statins can affect the levels of fatty acids in the blood, including omega-3 fatty acids. Statins may reduce the levels of omega-3 fatty acids in the blood, but the exact mechanism is not yet clear [2].

Medical News Today suggests that while both fish oil and statins can help lower cholesterol levels, they work in different ways. Fish oil lowers triglycerides, a type of fat in the blood, and has anti-inflammatory properties, while statins lower LDL cholesterol, also known as "bad" cholesterol [3].

There is no evidence to suggest that Lipitor affects the absorption of fish oil. However, if you are taking both Lipitor and fish oil, it is important to speak with your healthcare provider to ensure that there are no potential interactions or adverse effects [1][2][3].

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.consumerlab.com/answers/is-it-true-that-taking-a-statin-drug-negates-the-benefits-of-taking-fish-oil-supplements/statins-effect-on-fatty-acids/
[3] https://www.medicalnewstoday.com/articles/fish-oil-vs-statins