Lipitor is a brand name for the drug atorvastatin, which is used to lower cholesterol levels in the blood. According to Drug Patent Watch [1], Lipitor is available in tablet form in several strengths, including 10mg, 20mg, 40mg, and 80mg. The appropriate dose of Lipitor varies depending on the patient's cholesterol levels, medical history, and other factors. Therefore, it is essential to follow the doctor's instructions regarding the dosage and duration of treatment.

While Lipitor is generally considered safe and effective, it may cause side effects in some patients. The Mayo Clinic [2] states that the most common side effects of statins, including Lipitor, are muscle pain and weakness, liver damage, and digestive problems. However, these side effects are rare and usually mild. The benefits of taking Lipitor, such as reducing the risk of heart attack and stroke, usually outweigh the risks of side effects.

According to MedlinePlus [3], Lipitor should be taken once a day, with or without food. The dosage may be adjusted based on the patient's response to treatment and other factors. Patients should not stop taking Lipitor without consulting their doctor, as sudden discontinuation of the drug may cause a rebound effect and increase cholesterol levels.

In conclusion, the appropriate dose of Lipitor depends on the patient's individual needs and medical history. The drug is available in several strengths, including 10mg, 20mg, 40mg, and 80mg. Patients should follow their doctor's instructions regarding the dosage and duration of treatment. While Lipitor may cause side effects in some patients, they are usually mild and rare. Patients should not stop taking Lipitor without consulting their doctor.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.mayoclinic.org/diseases-conditions/high-blood-cholesterol/in-depth/statin-side-effects/art-20046013
[3] https://medlineplus.gov/druginfo/meds/a600045.html