Based on the available information, it is not possible for non-statin drugs to fully replace Lipitor's (atorvastatin) liver functions. Lipitor is a type of statin, a class of drugs that work by blocking a substance your body needs to make cholesterol [1]. The liver is responsible for producing cholesterol, and Lipitor inhibits this process, which in turn lowers the levels of cholesterol in the blood [1].

Non-statin drugs, on the other hand, work through different mechanisms to lower cholesterol levels. For instance, some of these drugs increase the breakdown and removal of cholesterol from the blood, while others block the absorption of cholesterol in the digestive system [2]. However, none of these non-statin drugs can mimic or replace the liver functions that Lipitor inhibits.

It is important to note that while Lipitor and other statins are effective in lowering cholesterol levels, they are not without risks. Statins can cause side effects such as liver damage, muscle pain, and digestive problems [1]. Therefore, non-statin drugs can be useful alternatives for individuals who cannot tolerate statins or have contraindications for their use [2].

In summary, non-statin drugs cannot fully replace Lipitor's liver functions as they work through different mechanisms to lower cholesterol levels. Non-statin drugs can be useful alternatives for certain individuals, but they should be used under the guidance of a healthcare professional.

Sources:
[1] Mayo Clinic. (2021). Statins: Are these cholesterol-lowering drugs right for you? <https://www.mayoclinic.org/diseases-conditions/high-blood-cholesterol/in-depth/statins/art-20045786>.
[2] American Heart Association. (2017). Types of Cholesterol Medication. <https://www.heart.org/en/health-topics/cholesterol/cholesterol-management-guidelines/types-of-cholesterol-medication>.
[3] DrugPatentWatch. (2021). Atorvastatin Calcium. <https://www.drugpatentwatch.com/drugs/atorvastatin>.