Based on the information available, there is no evidence to suggest that Lipitor, a medication commonly used to treat high cholesterol, directly causes calcium deficiency. Lipitor is a statin, a type of drug that works by blocking a substance your body needs to make cholesterol [1].

The U.S. National Library of Medicine's drug information for atorvastatin, the active ingredient in Lipitor, does not list calcium deficiency as a potential side effect [2]. Similarly, the Mayo Clinic does not list calcium deficiency as a possible side effect of Lipitor [3].

However, it's important to note that medications can interact with diet and other factors, potentially leading to changes in nutrient levels. For instance, some studies suggest that certain medications, including statins like Lipitor, may affect the body's absorption or utilization of certain nutrients [4].

If you have concerns about calcium deficiency or any other potential side effects related to your medication, it's crucial to consult with a healthcare professional. They can provide personalized advice based on your health history and current medications.

Sources:
[1] "Lipitor." MedlinePlus, U.S. National Library of Medicine, 15 Feb. 2022, medlineplus.gov/druginfo/meds/a601245.html.
[2] "Atorvastatin." MedlinePlus, U.S. National Library of Medicine, 15 Feb. 2022, medlineplus.gov/druginfo/meds/a601245.html.
[3] "Atorvastatin (Oral Route) Description and Brand Names." Mayo Clinic, Mayo Foundation for Medical Education and Research, 1 Jan. 2022, mayoclinic.org/drugs-supplements/atorvastatin-oral-route/description/drg-20064515.
[4] "Medication-Induced Nutrient Depletion." DrugPatentWatch, drugpatentwatch.com/resources/medication-induced-nutrient-depletion.