Lipitor is a medication used to lower cholesterol levels in the body, and it is generally safe to exercise while taking it. However, there is no specific timeframe for how long after taking Lipitor one should wait to exercise.

According to Drug Patent Watch [1], Lipitor's active ingredient, atorvastatin, has a half-life of approximately 14 hours. This means that after 14 hours, half of the medication will have been eliminated from the body. However, it is important to note that this does not necessarily mean that the medication is no longer effective in the body.

A study published in the Journal of Clinical Lipidology [3] found that exercise can actually enhance the effects of Lipitor in reducing cholesterol levels. The study concluded that exercise should be encouraged in patients taking Lipitor to improve their lipid profiles.

Another study published in the Journal of Atherosclerosis and Thrombosis [2] found that exercise can also improve endothelial function, which is important for cardiovascular health. The study concluded that exercise may have a synergistic effect with Lipitor in improving cardiovascular health.

In summary, there is no specific timeframe for how long after taking Lipitor one should wait to exercise. It is generally safe to exercise while taking Lipitor, and exercise may actually enhance the medication's effects in reducing cholesterol levels and improving cardiovascular health.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://pubmed.ncbi.nlm.nih.gov/28807461/
[3] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3463373/