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When combining Lipitor, a statin drug used to treat high cholesterol, with blood pressure (BP) medications, certain precautions should be taken. It is essential to monitor liver function and muscle pain, as both Lipitor and some BP drugs can affect these areas [1].

Lipitor can increase the risk of muscle damage, particularly when taken with other medications that can also affect muscles, such as some BP drugs [1]. This condition, known as rhabdomyolysis, can lead to kidney damage and other complications [1].

Combining Lipitor and BP drugs may also increase the risk of liver damage [1]. Patients should have their liver function regularly monitored while taking these medications [1].

In addition, some BP drugs, such as calcium channel blockers, can increase the levels of Lipitor in the blood, potentially increasing the risk of side effects [2].

It is crucial to consult with a healthcare provider before combining Lipitor and BP medications [1]. The healthcare provider may adjust the dosage or recommend regular monitoring to ensure the safe use of these medications [1].

Sources:
[1] "Lipitor and Muscle Pain." Drugs.com, <https://www.drugs.com/answers/lipitor-and-muscle-pain-19935.html>.
[2] "Lipitor Interactions." RxList, <https://www.rxlist.com/lipitor-drug.htm#interactions>.