Yes, there are lower dosages of Lipitor available. According to [2], Lipitor (atorvastatin) is available in dosages of 10 mg, 20 mg, 40 mg, and 80 mg. [3] confirms this information and adds that the starting dose of Lipitor is usually 10 mg once a day, with the maximum recommended dose being 80 mg once a day. However, the specific dosage prescribed will depend on various factors, including the patient's medical history, age, and other medications they may be taking. It is important to follow the dosage instructions provided by a healthcare provider and not adjust the dosage without consulting them first. [1] provides additional information about the expiration of Lipitor's patent, which has led to the availability of generic versions of the drug that may have different dosages and formulations.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.medicalnewstoday.com/articles/drugs-lipitor-dosage
[3] https://www.healthline.com/health/drugs/lipitor-dosage