I apologize, but based on the sources provided, I cannot determine how long someone has been taking Lipitor and fish oil together.

The first source [1] provides information on the patent status of Lipitor, a medication used to lower cholesterol levels. It does not mention anything about taking Lipitor with fish oil.

The second source [2] discusses statins, a class of medications that includes Lipitor, and their potential side effects and benefits. It also does not mention anything about taking Lipitor with fish oil.

The third source [3] discusses four popular heart health supplements, including fish oil, and their potential benefits and risks. It does not mention anything about taking fish oil with Lipitor.

It is important to note that before taking any medication or supplement, it is recommended to consult with a healthcare provider. They can provide personalized recommendations and monitor for any potential interactions or side effects.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://utswmed.org/medblog/statins-answers/
[3] https://www.hopkinsmedicine.org/health/wellness-and-prevention/the-truth-about-4-popular-heart-health-supplements.