Lipitor is a commonly prescribed medication for lowering cholesterol levels. According to Drug Patent Watch [1], Lipitor's active ingredient is atorvastatin calcium, which works by inhibiting the production of cholesterol in the liver. While there is no evidence to suggest that Lipitor is unsafe to take after exercise, it is important to consider the potential side effects of the medication.

A study published in the National Library of Medicine [2] found that atorvastatin calcium was generally well-tolerated by patients, with no significant differences in adverse events between those who exercised and those who did not. However, some patients may experience muscle pain or weakness as a side effect of the medication, which could be exacerbated by exercise. It is important to discuss any concerns about potential side effects with a healthcare provider.

To determine heart rate recovery after exercise, Health Central [3] recommends taking your pulse immediately after exercising and then again after one minute of rest. Subtract the second number from the first to determine your heart rate recovery. A slower recovery time may indicate a higher risk of cardiovascular disease.

In conclusion, while there is no evidence to suggest that Lipitor is unsafe to take after exercise, it is important to consider potential side effects and discuss any concerns with a healthcare provider. Monitoring heart rate recovery after exercise can also provide valuable information about cardiovascular health.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4679305/
[3] https://www.healthcentral.com/fitness-and-exercise/how-to-calculate-heart-rate-recovery-after-exercise