Based on the information provided, I was unable to find a specific timeframe for when a decline starts after taking Lipitor (atorvastatin). Lipitor is a statin medication used to treat high cholesterol levels and prevent cardiovascular disease [1]. It works by reducing the production of cholesterol in the body [1].

While the drug's mechanism of action is well-understood, the specific timeline for a decline in cholesterol levels or cardiovascular health after starting Lipitor is not readily available. Factors such as the individual's baseline cholesterol levels, the dosage of Lipitor, and the presence of other cardiovascular risk factors may all influence the timing and extent of any decline in cholesterol levels or cardiovascular health [2].

It is important to note that Lipitor is typically taken as a long-term medication, and its effects on cholesterol levels and cardiovascular health are usually assessed over a period of several weeks or months [1]. Patients should consult with their healthcare provider for personalized advice on the expected timeline and outcomes of taking Lipitor [2].

In summary, while Lipitor is an effective medication for reducing cholesterol levels and preventing cardiovascular disease, the specific timeline for a decline in cholesterol levels or cardiovascular health after starting Lipitor is not readily available. The drug's effects are typically assessed over a period of several weeks or months, and patients should consult with their healthcare provider for personalized advice.

Sources:

[1] Mayo Clinic. (2021). Atorvastatin (Oral Route). Retrieved from <https://www.mayoclinic.org/drugs-supplements/atorvastatin-oral-route/description/drg-20063030>

[2] Drugs.com. (2021). Lipitor. Retrieved from <https://www.drugs.com/lipitor.html>

[3] DrugPatentWatch.com. (2021). Lipitor (Atorvastatin Calcium). Retrieved from <https://www.drugpatentwatch.com/drugs/lipitor>