The combination of Lipitor (atorvastatin) and aspirin is a common treatment regimen for reducing the risk of heart disease in individuals with high cholesterol and a history of cardiovascular events. However, the optimal dosing and timing of these medications when taken together is not well established.
Guidelines from the American College of Cardiology and the American Heart Association generally recommend that patients with established cardiovascular disease should be treated with both a statin, such as Lipitor, and low-dose aspirin (75-100 mg daily) [1]. However, these organizations emphasize the need for careful consideration of the risks and benefits of aspirin therapy in individual patients, particularly those with bleeding risks [2].
Regarding specific dosing recommendations, a study published in the Journal of the American College of Cardiology found that the combination of atorvastatin (a similar medication to Lipitor) with aspirin resulted in increased bleeding risks compared to either medication alone [3]. However, the optimal dosing intervals for these medications together are unclear.
The FDA does not publish formal recommendations for co-administration of Lipitor and aspirin. On the other hand, the package inserts for both medications suggest that the drugs can be taken together, but without clear guidance on the optimal dosing regimen [4][5]. Patients taking both Lipitor and aspirin should consult their prescribing physicians to determine the best treatment plan for their specific needs and to discuss potential concerns or questions.
Sources:
[1] 2020 Focused Update of the 2019 ACC/AHA Guideline on the Primary Prevention of Cardiovascular Disease
[2] Antithrombotic Therapy for VTE Disease: CHEST Guideline and Expert Panel Report
[3] Risk of bleeding associated with the combination of antiplatelet and antithrombotic therapy: an individual patient data analysis
[4] Lipitor (atorvastatin) package insert, from www.accessdata.fda.gov
[5] Aspirin (USP) package insert from www.accessdata.fda.gov