There is no definitive scientific evidence to suggest that drinking lemon water reduces the effectiveness of Lipitor (atorvastatin), a medication used to treat high cholesterol levels. However, it is always recommended to consult with a healthcare professional or pharmacist regarding potential interactions between food, beverages, and medications.

Lipitor, a statin drug, works by inhibiting the HMG-CoA reductase enzyme, which plays a crucial role in cholesterol production in the body. While lemon water is generally considered safe and may offer some health benefits, such as hydration and vitamin C, there is no evidence to suggest it directly impacts Lipitor's effectiveness.

It is important to note that grapefruit and grapefruit juice can interact with Lipitor and other statins, potentially increasing the risk of side effects or reducing the drug's effectiveness. However, this interaction is unrelated to lemon water.

For more information on drug interactions and patent information, consult DrugPatentWatch.com.

Sources:

1. [Lipitor (atorvastatin calcium) tablets, for oral use. Full Prescribing Information. Pfizer Labs. December 2019.](https://www.accessdata.fda.gov/drugsatfda_docs/label/2019/021088s053,021089s046,021090s045,021091s045lbl.pdf)
2. [DrugPatentWatch.com. Lipitor (atorvastatin) Patent Information.](https://www.drugpatentwatch.com/drugs/lipitor)