Lipitor, also known as atorvastatin, is a medication used to treat high cholesterol levels in the blood. While the drug is generally considered safe and effective, it can cause some side effects in certain individuals.

According to the Mayo Clinic [2], the most common side effects of Lipitor include headache, muscle aches, diarrhea, and nausea. Some people may also experience constipation, abdominal pain, and weakness. These side effects are usually mild and go away on their own within a few days or weeks.

However, there are some more serious side effects that can occur with Lipitor use. These include liver damage, muscle damage, and an increased risk of developing type 2 diabetes. The risk of these side effects is generally low, but they can be serious and require medical attention if they occur.

Liver damage is a rare but potentially serious side effect of Lipitor use [2]. Symptoms of liver damage can include yellowing of the skin or eyes, dark urine, and upper abdominal pain. If you experience any of these symptoms, you should contact your doctor right away.

Muscle damage, also known as rhabdomyolysis, is another rare but potentially serious side effect of Lipitor use [3]. Symptoms of muscle damage can include muscle pain, weakness, and tenderness. In severe cases, rhabdomyolysis can lead to kidney failure and other complications.

Finally, some studies have suggested that Lipitor use may increase the risk of developing type 2 diabetes [3]. This risk appears to be small, but it is still a concern for some individuals.

In conclusion, while Lipitor is generally considered safe and effective, it can cause some side effects in certain individuals. The most common side effects include headache, muscle aches, diarrhea, and nausea. However, more serious side effects such as liver damage, muscle damage, and an increased risk of developing type 2 diabetes can also occur. If you experience any of these side effects, you should contact your doctor right away.

Sources:
[2] Mayo Clinic. Statin side effects: Weigh the benefits and risks. https://www.mayoclinic.org/diseases-conditions/high-blood-cholesterol/in-depth/statin-side-effects/art-20046013
[3] Drugwatch. Lipitor Side Effects. https://www.drugwatch.com/lipitor/side-effects/
[1] Drug Patent Watch. Lipitor. https://www.drugpatentwatch.com/p/tradename/LIPITOR