Lipitor (atorvastatin) is a prescription medication used to lower cholesterol levels in the blood, while fish oil supplements are commonly used to improve cardiovascular health. According to Drugs.com, there is a potential interaction between Lipitor and fish oil supplements, as both can affect the liver and increase the risk of bleeding. Therefore, it is recommended to monitor liver function and blood clotting in patients taking both medications [2]. However, ConsumerLab.com states that taking a statin drug like Lipitor does not negate the benefits of taking fish oil supplements, and that both can be used together to improve cardiovascular health [3]. It is always important to consult with a healthcare provider before starting any new medications or supplements, especially if you are taking other medications or have underlying health conditions.

Sources:
[2] https://www.drugs.com/drug-interactions/fish-oil-with-lipitor-1749-3873-276-128.html
[3] 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/