Lipitor is a medication used to lower cholesterol levels in the blood. It is a type of drug called a statin, which works by blocking an enzyme that the liver needs to produce cholesterol. While Lipitor is generally well-tolerated, it can cause side effects in some people [2]. According to the Mayo Clinic [2], some of the most common side effects of statins include muscle pain and tenderness, which can be severe in some cases. However, the same source also notes that these side effects are rare and usually go away on their own within a few weeks.

As for whether Lipitor can interfere with pain relief, there is no direct evidence to suggest that it does. However, it is possible that some people may experience pain or discomfort while taking Lipitor, which could make it more difficult to manage other types of pain. Additionally, some pain medications, such as nonsteroidal anti-inflammatory drugs (NSAIDs), can interact with Lipitor and increase the risk of side effects [3]. Therefore, it is important to talk to your doctor if you are taking Lipitor and also need to take pain medication.

In summary, Lipitor is a medication used to lower cholesterol levels in the blood, and it can cause side effects such as muscle pain and tenderness in some people. While there is no direct evidence to suggest that Lipitor interferes with pain relief, it is possible that some people may experience pain or discomfort while taking the drug. Additionally, it is important to talk to your doctor if you are taking Lipitor and also need to take pain medication, as some types of pain medication can interact with the drug and increase the risk of side effects [2][3].

Sources:
[2] "Statin side effects: Weigh the benefits and risks." Mayo Clinic. https://www.mayoclinic.org/diseases-conditions/high-blood-cholesterol/in-depth/statin-side-effects/art-20046013
[3] "Lipitor oral: Uses, side effects, interactions, pictures, warnings & dosing." WebMD. https://www.webmd.com/drugs/2/drug-3330/lipitor-oral/details