Based on the available information, there are no specific nuts that have been identified as problematic when taking Lipitor, a medication commonly prescribed to manage high cholesterol levels. However, it's important to note that certain foods, including nuts, can interact with statins, the class of drug to which Lipitor belongs, potentially enhancing or reducing their effectiveness or increasing the risk of side effects [3].

Renown Health's blog post on foods to avoid when taking heart medications does not specifically list any nuts as problematic with Lipitor or statins generally [2]. The Mayo Clinic's article on statin side effects also does not identify any specific nuts as concerning [3].

However, nuts are generally considered a heart-healthy food due to their unsaturated fats, fiber, and other nutrients [1][3]. Therefore, unless a specific individual has an allergy or intolerance to a particular type of nut, they are typically encouraged to include nuts in their diet.

In conclusion, while no specific nuts should be avoided with Lipitor, it's always advisable to consult with a healthcare provider or pharmacist for personalized advice regarding diet and medication interactions.

Sources:
[1] DrugPatentWatch. (n.d.). Lipitor. Retrieved from https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] Renown Health. (2021, April 26). Foods to Avoid When Taking Heart Medications. Retrieved from https://www.renown.org/blog/foods-to-avoid-when-taking-heart-medications
[3] Mayo Clinic. (2021, August 20). Statin side effects: What's real, what's not. Retrieved from https://www.mayoclinic.org/diseases-conditions/high-blood-cholesterol/in-depth/statin-side-effects/art-20046013