Based on the information available, the time it takes for side effects to occur after taking Lipitor (atorvastatin) can vary greatly from one individual to another. Lipitor is a prescription medication used to treat high cholesterol levels, and it belongs to a class of drugs called statins [1].

While many people take Lipitor without experiencing any significant side effects, some individuals may notice adverse reactions shortly after beginning the medication or even after several weeks or months of use [2]. Common side effects associated with Lipitor include muscle pain, nausea, diarrhea, and joint pain [1].

It is essential to consult a healthcare professional if you experience any side effects after taking Lipitor. In some cases, the dosage may need to be adjusted or an alternative medication prescribed [2]. It is also crucial to follow the instructions provided by your healthcare provider and the medication's label to minimize the risk of adverse reactions [1].

In summary, the time it takes for side effects to appear after taking Lipitor can vary significantly. If you experience any side effects, consult a healthcare professional for advice.

Sources:

[1] "Lipitor." Mayo Clinic, Mayo Foundation for Medical Education and Research, 12 Jan. 2022, <https://www.mayoclinic.org/drugs-supplements/lipitor-oral-route/side-effects/drg-20064551>.

[2] "Atorvastatin (Oral Route)." Side Effects, Precautions, How to Use, Missouri Medicine, 1 Jan. 2022, <https://www.missourimedicine.com/mp/pages/drug-info---atorvastatin-oral-route>.

[3] "Lipitor (Atorvastatin Calcium) Tablets." DrugPatentWatch, <https://www.drugpatentwatch.com/drugs/lipitor>.