Based on the information provided, there is no specific amount of kale that is considered safe or unsafe when taking Lipitor (atorvastatin), a medication used to treat high cholesterol. However, it is important to be aware that certain foods, including kale, contain high levels of vitamin K, which can affect how Lipitor works in the body.

Vitamin K can interfere with the ability of Lipitor to lower cholesterol levels. Therefore, it is recommended to maintain a consistent intake of vitamin K-rich foods, including kale, while taking Lipitor. Drastic changes in the amount of kale or other vitamin K-rich foods in your diet can affect the medication's effectiveness.

It is always best to consult with a healthcare provider or pharmacist for personalized advice on how to balance your diet and medications. They can provide guidance on how much kale or other specific foods are safe to consume while taking Lipitor.

In summary, there is no specific amount of kale that is considered safe or unsafe with Lipitor, but maintaining a consistent intake of vitamin K-rich foods is recommended. Consult a healthcare provider for personalized advice.

Sources:

1. <https://www.drugpatentwatch.com/p/tradename/LIPITOR>
2. <https://www.nkch.org/blog/foods-that-can-fool-with-your-meds>
3. <https://www.webmd.com/drugs/2/drug-3330/lipitor-oral/details>