Lipitor (atorvastatin) is a type of medication called a statin that is used to lower cholesterol levels in the blood. Aspirin is a nonsteroidal anti-inflammatory drug (NSAID) that is used to reduce pain, fever, and inflammation. While both drugs have different mechanisms of action, they can be prescribed together in some cases.

According to the NHS [2], statins like Lipitor are generally safe and well-tolerated, but like all medications, they can cause side effects. The most common side effects of statins include muscle pain, digestive problems, and an increased risk of developing type 2 diabetes. However, the NHS does not mention any interactions between statins and aspirin.

A study published in the Journal of the American College of Cardiology [3] investigated the effects of combining aspirin with statins in patients with stable coronary artery disease. The study found that the combination of aspirin and statins did not increase the risk of adverse events, such as bleeding or liver damage, compared to aspirin alone. The study concluded that the combination of aspirin and statins was safe and effective for patients with stable coronary artery disease.

DrugPatentWatch [1] does not provide information on drug interactions, but it does list the side effects of Lipitor. These side effects include muscle pain, weakness, and tenderness, as well as liver problems and an increased risk of developing type 2 diabetes. However, there is no mention of any interactions between Lipitor and aspirin.

In conclusion, while both Lipitor and aspirin can cause side effects, there is no evidence to suggest that Lipitor can worsen the side effects of aspirin. A study published in the Journal of the American College of Cardiology found that the combination of aspirin and statins, like Lipitor, was safe and effective for patients with stable coronary artery disease. However, as with any medication, it is important to discuss potential interactions and side effects with a healthcare provider before starting treatment.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.nhs.uk/conditions/statins/side-effects/
[3] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3070374/