Based on the available information, it is generally considered safe to combine Lipitor and fish oil regularly, as they are both commonly used to help lower cholesterol levels. However, it is essential to consult with a healthcare provider before starting or combining any medications or supplements, as individual responses can vary.

Lipitor, also known as atorvastatin, is a medication used to lower cholesterol levels and prevent heart disease [1]. Fish oil, on the other hand, contains omega-3 fatty acids, which have been shown to have heart health benefits [2].

According to Medical News Today, fish oil and statins, such as Lipitor, may have additive effects on reducing triglyceride levels and increasing "good" HDL cholesterol [3]. Healthline also notes that there is no known significant interaction between fish oil and statins [4].

However, it is important to note that taking fish oil supplements may affect the dosage of Lipitor required to achieve the desired cholesterol levels. Therefore, regular monitoring of cholesterol levels and communication with a healthcare provider is crucial when combining these substances.

In summary, based on the available information, it is generally considered safe to combine Lipitor and fish oil regularly. However, it is essential to consult with a healthcare provider before starting or combining any medications or supplements, as individual responses can vary.

Sources:
[1] <https://www.drugpatentwatch.com/p/tradename/LIPITOR>
[2] <https://www.medicalnewstoday.com/articles/fish-oil-vs-statins>
[3] <https://www.medicalnewstoday.com/articles/fish-oil-vs-statins>
[4] <https://www.healthline.com/health/statins-omega-3-interaction>