Lipitor is a brand name for atorvastatin, a medication used to lower cholesterol levels in the blood. According to the NHS, statins such as Lipitor are generally safe and well-tolerated, but like any medication, they can have side effects. Common side effects of Lipitor include headache, muscle pain, and digestive problems such as constipation, diarrhea, and nausea. However, most people who take Lipitor do not experience any side effects [2].

When to take Lipitor can also affect its side effects. According to K Health, taking Lipitor at night may be more effective in lowering cholesterol levels and reducing the risk of heart disease than taking it in the morning. This is because the body produces more cholesterol at night, so taking Lipitor before bed can help to block the production of cholesterol more effectively [3]. However, taking Lipitor at night may also increase the risk of side effects such as muscle pain and liver damage. Therefore, it is important to follow your doctor's instructions and take Lipitor as prescribed [3].

In conclusion, Lipitor can have side effects, but most people who take it do not experience any. Common side effects include headache, muscle pain, and digestive problems. Taking Lipitor at night may be more effective in lowering cholesterol levels, but it may also increase the risk of side effects. It is important to follow your doctor's instructions and take Lipitor as prescribed [2][3].

Sources:
[2] NHS Inform. (2021). Statins. https://www.nhsinform.scot/tests-and-treatments/medicines-and-medical-aids/types-of-medicine/statins
[3] K Health. (2021). When to Take Atorvastatin: Morning or Night? https://www.khealth.com/learn/high-cholesterol/when-to-take-atorvastatin-morning-or-night/