Lipitor is a brand name for the drug atorvastatin, which is a medication used to lower cholesterol levels in the blood [1]. There is no evidence to suggest that Lipitor affects breathing during yoga poses. However, it is important to note that yoga can be risky if not done correctly. Overdoing yoga can cause injury, especially to the neck, shoulders, spine, and knees [3]. Therefore, it is important to practice yoga with caution and under the guidance of a qualified instructor. On the other hand, gentle yoga may aid migraine sufferers, according to a study published by Reuters [2]. The study found that practicing yoga for 30 minutes, three times a week, can reduce the frequency, intensity, and duration of migraines. In conclusion, there is no evidence to suggest that Lipitor affects breathing during yoga poses, but it is important to practice yoga with caution and under the guidance of a qualified instructor. Additionally, gentle yoga may aid migraine sufferers [1][2][3].

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.reuters.com/article/health-yoga-migraine-dc/gentle-yoga-may-aid-migraine-sufferers-idUKCOL66234620070516
[3] https://www.everydayhealth.com/yoga/are-you-doing-too-much-yoga-heres-how-to-tell-and-why-it-can-be-risky/