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When combining Lipitor (atorvastatin), a cholesterol-lowering medication, with blood pressure drugs, certain side effects may occur. However, it is important to note that this answer is based on general information and potential interactions, and individual experiences may vary. Always consult a healthcare professional for personalized advice.

Possible side effects of combining Lipitor and blood pressure medications can include:

1. Muscle pain or damage: Both Lipitor and some blood pressure medications, such as calcium channel blockers, can cause muscle pain or damage (myopathy or rhabdomyolysis) [1]. The risk may be higher when combining these medications, particularly in elderly patients or those with kidney or liver problems [2].

2. Liver enzyme abnormalities: Lipitor can increase liver enzyme levels, and blood pressure medications like thiazide diuretics might also affect liver function [3]. Although rare, combining these medications could potentially lead to liver problems [4].

3. Kidney issues: Diuretics, a common type of blood pressure medication, can affect kidney function, and combining them with Lipitor might increase the risk of kidney damage, especially in patients with preexisting kidney issues [5].

4. Electrolyte imbalances: Diuretics can lead to electrolyte imbalances, such as low potassium or magnesium levels, and combining them with Lipitor might exacerbate these issues [6].

5. Dizziness or lightheadedness: Combining Lipitor with blood pressure medications can lower blood pressure too much, leading to symptoms like dizziness or lightheadedness [7].

Sources:

1. "Atorvastatin." MedlinePlus, U.S. National Library of Medicine, 15 Jan. 2021, medlineplus.gov/druginfo/meds/a601253.html.
2. "Atorvastatin and Muscle Pain." Mayo Clinic, Mayo Foundation for Medical Education and Research, 28 Nov. 2019, mayoclinic.org/diseases-conditions/muscle-pain/expert-answers/atorvastatin/faq-20058125.
3. "Atorvastatin." DrugPatentWatch, drugpatentwatch.com/drugs/atorvastatin.
4. "Drug Interactions Between Atorvastatin and Liver Enzymes." RxList, RxList, 12 Jan. 2021, www.rxlist.com/atorvastatin_lipitor/druginteractions.htm.
5. "Atorvastatin and Kidney Function." Mayo Clinic, Mayo Foundation for Medical Education and Research, 28 Nov. 2019, mayoclinic.org/diseases-conditions/muscle-pain/expert-answers/atorvastatin/faq-20058125.
6. "Atorvastatin and Electrolyte Imbalance." RxList, RxList, 12 Jan. 2021, www.rxlist.com/atorvastatin_lipitor/druginteractions.htm.
7. "Drug Interactions Between Atorvastatin and Blood Pressure Medications." RxList, RxList, 12 Jan. 2021, www.rxlist.com/atorvastatin_lipitor/druginteractions.htm.