Based on the information available, there are no significant negative interactions between Lipitor (atorvastatin) and ACE inhibitors (Angiotensin-Converting Enzyme inhibitors) [1]. Both Lipitor and ACE inhibitors are commonly prescribed medications for different health conditions. Lipitor is a statin, a type of drug used to lower cholesterol levels, while ACE inhibitors are used to treat high blood pressure and heart failure, among other conditions [2][3].

However, as with any medication, there is a possibility of interactions with other drugs, including over-the-counter medications, vitamins, and supplements [1]. Therefore, it is always important to inform your healthcare provider of all medications and supplements you are taking [1].

It is also worth noting that while there may not be significant negative interactions between Lipitor and ACE inhibitors, both medications can have side effects [2][3]. Common side effects of Lipitor include diarrhea, upset stomach, and muscle or joint pain [2]. ACE inhibitors can cause cough, dizziness, and headache, among other side effects [3].

In conclusion, while there are no significant negative interactions between Lipitor and ACE inhibitors, it is always important to consult with a healthcare provider before starting or changing any medication regimen.

Sources:
[1] DrugPatentWatch.com. (n.d.). Lipitor and ACE Inhibitors Interaction. Retrieved from <https://www.drugpatentwatch.com/interactions/lipitor-atorvastatin-and-ace-inhibitors>
[2] Mayo Clinic. (2021, April 16). Atorvastatin (Oral Route). Retrieved from <https://www.mayoclinic.org/drugs-supplements/atorvastatin-oral-route/side-effects/drg-20067650>
[3] Mayo Clinic. (2021, April 16). Angiotensin-Converting Enzyme (ACE) Inhibitors. Retrieved from <https://www.mayoclinic.org/diseases-conditions/high-blood-pressure/in-depth/angiotensin-converting-enzyme-ace-inhibitors/art-20047355>