Based on the information available, there is no direct evidence to suggest that Lipitor, a medication used to treat high cholesterol, has a significant impact on weightlifting strength. Lipitor is a statin, a class of drugs that work by blocking a substance your body needs to make cholesterol [1].

The effects of Lipitor are primarily focused on reducing cholesterol levels, which can help prevent heart disease and stroke [1]. There is no mention of Lipitor impacting muscle strength or weightlifting performance in the clinical trials or post-marketing surveillance data provided by the drug's manufacturer, Pfizer [1].

However, it's important to note that all medications, including Lipitor, can have side effects. Some people may experience muscle pain or weakness while taking Lipitor [1]. If this occurs, it could potentially impact a person's ability to weightlift or perform other physical activities. However, this does not necessarily mean that Lipitor is reducing strength; the muscle pain or weakness could be a direct side effect of the medication.

If you have concerns about how Lipitor or any other medication might be affecting your weightlifting or physical performance, it's important to discuss these concerns with your healthcare provider. They can provide personalized advice based on your health history and current medications.

Sources:
[1] DrugPatentWatch.com - Lipitor Drug Profile
https://www.drugpatentwatch.com/drugs/lipitor
[2] Mayo Clinic - Statins
https://www.mayoclinic.org/diseases-conditions/high-blood-cholesterol/in-depth/statins/art-20045786
[3] Pfizer - Lipitor (atorvastatin) Prescribing Information
https://www.pfizer.com/products/product-detail/lipitor