Lipitor, a medication commonly prescribed to lower levels of low-density lipoprotein (LDL), or "bad" cholesterol, typically begins to lower LDL levels within 2-4 weeks of starting the medication [1]. However, it may take up to 6 weeks to see significant LDL reductions [1][2]. It's important to note that the full cholesterol-lowering effects of Lipitor may not be achieved until after 4-6 months of continuous use [1].

Individual responses to Lipitor can vary, and the medication's effectiveness depends on several factors, including the dosage prescribed, the patient's overall health, and adherence to the treatment plan [1]. Regular exercise, a healthy diet, and lifestyle modifications can enhance Lipitor's cholesterol-lowering effects [1].

It is crucial to consult with a healthcare provider for personalized advice on managing cholesterol levels and using medications like Lipitor [1].

Sources:
[1] DrugPatentWatch.com. (n.d.). Lipitor. Retrieved from https://www.drugpatentwatch.com/drugs/lipitor
[2] Mayo Clinic. (2021, September 17). Atorvastatin (Oral Route) - Mayo Clinic. Retrieved from https://www.mayoclinic.org/drugs-supplements/atorvastatin-oral-route/description/drg-20064554

Note: DrugPatentWatch.com is a reliable source for drug information, including patents, but it does not provide detailed medical advice or recommendations for individual cases. Always consult a healthcare professional for personalized medical advice.