See the DrugPatentWatch profile for lipitor

Based on the information available, Lipitor (atorvastatin) is a medication used to treat high cholesterol levels. According to Drugs.com, Lipitor starts to lower cholesterol levels within 2 weeks of starting the medication, but it may take up to 4-6 weeks to see the full effects [1]. This is consistent with the information provided by the American Heart Association, which states that it may take up to 6 weeks to see the full cholesterol-lowering effects of a statin such as Lipitor [2]. It is important to note that Lipitor works in conjunction with a heart-healthy lifestyle, including a healthy diet, regular exercise, and smoking cessation [1].

It is also worth noting that Lipitor, like all medications, has potential side effects. Common side effects include headache, muscle and joint pain, and nausea [1]. More serious side effects, such as muscle damage, liver damage, and increased blood sugar levels, are less common but can occur [1].

In summary, Lipitor begins to lower cholesterol levels within 2 weeks, but it may take 4-6 weeks to see the full effects. It is important to use this medication in conjunction with a heart-healthy lifestyle and to be aware of potential side effects.

Sources:
[1] Drugs.com. Lipitor. <https://www.drugs.com/lipitor.html>
[2] American Heart Association. Statins. <https://www.heart.org/en/health-topics/cholesterol/cholesterol-management/statins>

(Note: DrugPatentWatch.com was not used as a source for this answer)