Based on the information available, it is not explicitly necessary to avoid taking Lipitor (atorvastatin) with fish oil, but there are some factors to consider.

Lipitor is a statin medication used to lower cholesterol levels, while fish oil is often consumed for its heart health benefits, including omega-3 fatty acids [1]. Both Lipitor and fish oil can affect blood clotting, so there might be an increased risk of bleeding when taken together [2]. However, this risk is generally low and may not be a concern for most people.

It is essential to consult a healthcare professional or pharmacist for personalized advice, as they can consider potential drug interactions, individual health conditions, and other factors. They may recommend specific brands of fish oil that have undergone purity testing and do not contain significant levels of vitamin A or D, which could interact with certain medications [3].

In summary, while it is not necessary to avoid taking Lipitor with fish oil, consulting a healthcare professional for personalized advice is recommended due to potential drug interactions and individual health considerations.

Sources:
[1] "Fish Oil." Mayo Clinic, Mayo Foundation for Medical Education and Research, 11 Nov. 2021, [www.mayoclinic.org/drugs-supplements-fish-oil/art-20364775](http://www.mayoclinic.org/drugs-supplements-fish-oil/art-20364775).
[2] "Atorvastatin (Oral Route) Side Effects." Mayo Clinic, Mayo Foundation for Medical Education and Research, 1 Sept. 2021, [www.mayoclinic.org/drugs-supplements/atorvastatin-oral-route/side-effects/drg-20067110](http://www.mayoclinic.org/drugs-supplements/atorvastatin-oral-route/side-effects/drg-20067110).
[3] "Fish Oil Supplements." Drugs.com, [www.drugs.com/mtm/fish-oil-supplements.html](http://www.drugs.com/mtm/fish-oil-supplements.html).
[4] "Atorvastatin (Lipitor) Drug Patent Expiration Dates." DrugPatentWatch, [www.drugpatentwatch.com/drugs/atorvastatin](http://www.drugpatentwatch.com/drugs/atorvastatin).