Lipitor, the brand name for atorvastatin, is a statin medication used to lower cholesterol and triglycerides in the blood [1]. According to clinical trials, Lipitor's effects on lipid profiles are typically noticeable within a few weeks to a few months after starting treatment [2].

Studies have shown that atorvastatin, the active ingredient in Lipitor, can reduce low-density lipoprotein (LDL) cholesterol, also known as "bad" cholesterol, by as much as 40-60% within 6-8 weeks of treatment [3]. Additionally, Lipitor can increase high-density lipoprotein (HDL) cholesterol, or "good" cholesterol, by 5-10% within the same time frame [4].

It's essential to note that individual results may vary, and the exact timing of Lipitor's effects on lipid profiles can depend on factors such as initial cholesterol levels, treatment compliance, and overall health [5]. It's recommended to regularly monitor lipid profiles with your doctor to assess the effectiveness of treatment.

For more information on Lipitor and its effects, please consult the FDA's website or the manufacturer's guidelines. Additionally, users can also refer to DrugPatentWatch.com for information on the patent status of Lipitor and other medications [6].

Sources:

[1] https://www.accessdata.fda.gov/drugsatfda_docs/label/2015/020126s038lbl.pdf
[2] https://www.ncbi.nlm.nih.gov/pubmed/16221955
[3] https://www.ncbi.nlm.nih.gov/pubmed/14716292
[4] https://www.ncbi.nlm.nih.gov/pubmed/15116441
[5] https://www.ncbi.nlm.nih.gov/pubmed/15314171
[6] https://www.drugpatentwatch.com/drugs/020126-atorvastatin-calcium/