Lipitor, also known as atorvastatin, is a medication used to lower cholesterol levels in the blood. Like any medication, it can cause side effects. Here are some Lipitor side effects to watch for:

1. Muscle pain and weakness: This is the most common side effect of Lipitor. It can range from mild discomfort to severe muscle damage, which can lead to kidney failure. [2]

2. Liver damage: Lipitor can cause liver damage, which can lead to liver failure in rare cases. Signs of liver damage include yellowing of the skin or eyes, dark urine, and abdominal pain. [2]

3. Increased blood sugar levels: Lipitor can increase blood sugar levels, which can lead to type 2 diabetes. This is more common in people who have a history of diabetes or other risk factors. [3]

4. Memory problems: Lipitor can cause memory problems and confusion in some people. This is usually mild and goes away when the medication is stopped. [1]

5. Allergic reactions: Lipitor can cause allergic reactions in some people. Signs of an allergic reaction include hives, difficulty breathing, and swelling of the face, lips, tongue, or throat. [2]

It is important to talk to your doctor if you experience any of these side effects or any other unusual symptoms while taking Lipitor. Your doctor may adjust your dosage or switch you to a different medication.

Sources:
[1] https://www.singlecare.com/blog/lipitor-side-effects/
[2] https://www.drugwatch.com/lipitor/side-effects/
[3] https://www.drugpatentwatch.com/p/tradename/LIPITOR