Lipitor is a medication used to lower cholesterol levels in the blood. According to Drug Patent Watch [1], the active ingredient in Lipitor is atorvastatin. Atorvastatin is used to reduce the risk of heart attack, stroke, and other cardiovascular diseases in patients with high cholesterol levels.

Yoga is a form of exercise that involves stretching and strengthening the body through various poses and movements. According to Everyday Health [2], yoga has many benefits, including improving flexibility, balance, and strength.

In a study published in the Journal of Ayurveda and Integrative Medicine [3], it was found that yoga can have a positive impact on cardiovascular health. The study showed that yoga can reduce blood pressure, lower cholesterol levels, and improve overall cardiovascular function.

Based on these sources, it is safe for Lipitor users to do yoga stretches. In fact, yoga may have additional benefits for Lipitor users by improving their cardiovascular health. However, it is always recommended that individuals consult with their healthcare provider before starting any new exercise regimen, especially if they have any underlying health conditions or concerns.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.everydayhealth.com/fitness-pictures/yoga-poses-for-beginners.aspx
[3] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4679305/