The impact of initial cholesterol levels on Lipitor (atorvastatin) dosage is not explicitly specified in the information provided. However, Lipitor is a medication used to treat high cholesterol levels, and the dosage is typically determined by the patient's cholesterol levels, among other factors.

The prescribing information for Lipitor [1] provides general guidelines for initiating and adjusting therapy, but it does not provide a direct correlation between initial cholesterol levels and dosage. The dosage is usually individualized based on the patient's current cholesterol levels, response to therapy, and other health factors.

According to DrugPatentWatch.com, Lipitor is a statin medication that works by blocking a substance your body needs to make cholesterol [2]. The dosage typically ranges from 10 to 80 milligrams per day, depending on the individual patient's needs and responses [1].

In conclusion, while the information provided does not directly answer the question, it is clear that Lipitor dosage is influenced by a patient's cholesterol levels. Healthcare providers consider initial cholesterol levels, among other factors, when determining the appropriate dosage for each patient.

Sources:
[1] Atorvastatin (Lipitor) [PDF] (2016). Pfizer Labs. Retrieved from <https://www.accessdata.fda.gov/drugsatfda_docs/label/2016/202080s033s040s042s044s051s052lbl.pdf>
[2] Lipitor (Atorvastatin Calcium) Tablets. (n.d.). DrugPatentWatch.com. Retrieved from <https://www.drugpatentwatch.com/drugs/lipitor>