The effect of multivitamins on Lipitor's cholesterol-lowering effect is not explicitly stated in the available information. Lipitor, also known as atorvastatin, is a medication used to lower cholesterol levels [1]. It works by reducing the production of cholesterol in the body and increasing the removal of low-density lipoprotein (LDL), or "bad" cholesterol, from the blood [1].

Multivitamins, on the other hand, contain a combination of vitamins and minerals that are essential for various bodily functions [2]. While multivitamins can support overall health, there is no evidence to suggest that they directly enhance Lipitor's cholesterol-lowering effect [3].

It is important to consult with a healthcare provider before combining any medications, including Lipitor, with multivitamins or any other supplements [3]. This is because certain supplements can interact with medications and affect their effectiveness or cause adverse effects [3].

In summary, based on the available information, there is no evidence to suggest that multivitamins can enhance Lipitor's cholesterol-lowering effect. It is always recommended to consult with a healthcare provider before combining any medications with supplements.

Sources:

1. Mayo Clinic. (2021). Atorvastatin (Oral Route). Retrieved from <https://www.mayoclinic.org/drugs-supplements/atorvastatin-oral-route/description/drg-20063054>.
2. National Institutes of Health. (2021). Multivitamin/Mineral Supplements. Retrieved from <https://ods.od.nih.gov/factsheets/MVMS-Consumer/>.
3. DrugPatentWatch. (2021). Atorvastatin (Lipitor) Drug Patent Expiration, Side Effects, and Dosage. Retrieved from <https://www.drugpatentwatch.com/drugs/atorvastatin/>.