Lipitor (atorvastatin) is a medication that belongs to a class of drugs called statins. It is used to lower cholesterol levels and reduce the risk of heart disease. The dosage of Lipitor varies depending on the patient's age, medical condition, and response to treatment.

According to the first source [1], the recommended starting dose of Lipitor is usually 10 mg once daily, which can be increased to a maximum dose of 80 mg once daily. However, the dose may need to be adjusted in patients with liver or kidney disease or those taking certain medications.

A study published in Arteriosclerosis, Thrombosis, and Vascular Biology [2] investigated the relationship between statin use and the risk of blood clots. The study found that statin use was associated with a lower risk of venous thromboembolism (VTE), which is a type of blood clot that usually occurs in the legs or lungs. The study also found that the risk of VTE was lower in patients taking higher doses of statins, including Lipitor.

However, it is important to note that all medications, including Lipitor, carry some risk of side effects. According to Medscape [3], the most common side effects of Lipitor include muscle pain, weakness, and tenderness, which can be a sign of a rare but serious side effect called rhabdomyolysis. This condition can lead to kidney damage and even death in severe cases.

In conclusion, the recommended dosage of Lipitor varies depending on the patient's medical condition and response to treatment. While higher doses of Lipitor may be associated with a lower risk of blood clots, all medications carry some risk of side effects, including muscle pain and weakness. Patients taking Lipitor should be monitored closely for any signs of side effects and should talk to their doctor if they have any concerns.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.ahajournals.org/doi/full/10.1161/01.atv.0000151647.14923.ec
[3] https://reference.medscape.com/drug/lipitor-atorvaliq-atorvastatin-342446