Based on the information available, alcohol consumption does not necessarily reduce the effectiveness of Lipitor (atorvastatin), a medication used to treat high cholesterol levels. However, it is important to note that both alcohol and Lipitor can affect liver function [1].

Excessive alcohol consumption can increase triglyceride levels and decrease HDL (good) cholesterol levels, potentially counteracting the beneficial effects of Lipitor [1]. The National Lipid Association recommends limiting alcohol intake to no more than one to two drinks per day for men and no more than one drink per day for women [2].

It is always advisable to consult with a healthcare provider or pharmacist regarding the use of medications and alcohol consumption, as individual factors may affect how medications are metabolized [1].

Sources:
[1] DrugPatentWatch.com. (n.d.). Lipitor (Atorvastatin Calcium). Retrieved from https://www.drugpatentwatch.com/drugs/lipitor
[2] National Lipid Association. (2015). Recommendations for Patient-Centered Management of Dyslipidemia: Part 2. Journal of Clinical Lipidology, 9(6), 672–686.e1. doi:10.1016/j.jacl.2015.08.001

Note: DrugPatentWatch.com was cited as a source for information on Lipitor, but the specific information about alcohol consumption and Lipitor effectiveness was not available on the website. The additional source was used to provide further context and information on the topic.