15 Little-Known Side Effects of Atorvastatin You Should Know
Atorvastatin (brand name Lipitor) is a statin used to lower LDL cholesterol and reduce the risk of heart attack and stroke. It is generally well tolerated, and many people take it without significant problems. Still, like any medication, it can cause side effects ranging from relatively mild symptoms to rare but serious complications.
Here are 15 effects worth knowing about.
1. Muscle aches and soreness
Unexplained muscle pain, tenderness, or aching is one of the best-known statin-related problems. The symptoms can range from mild discomfort to significant weakness.
2. Muscle weakness
Some people notice weakness rather than pain—for example, difficulty climbing stairs or lifting objects. Persistent or unexplained weakness should be discussed with a clinician.
3. Severe muscle breakdown
Rarely, atorvastatin can cause rhabdomyolysis, a serious breakdown of muscle tissue that can damage the kidneys. The risk is higher with certain drug interactions, higher doses, kidney problems, uncontrolled hypothyroidism, and older age.
Severe muscle pain or weakness, particularly with dark-colored urine, requires prompt medical attention.
4. Diarrhea
Diarrhea is a recognized side effect and may occur during treatment. Persistent or severe diarrhea should be discussed with a healthcare professional.
5. Nausea
Some people experience nausea or an upset stomach while taking atorvastatin. These symptoms are usually not dangerous but can be troublesome if persistent.
6. Heartburn and gas
Heartburn and increased gas are listed among possible atorvastatin side effects.
7. Joint pain
Joint pain can occur during treatment, although joint symptoms can obviously have many other causes as well.
8. Headache or dizziness
Headache and dizziness have been reported with statins, including atorvastatin. If dizziness is persistent or severe, it’s worth discussing with your healthcare professional.
9. Memory problems or forgetfulness
Some people report forgetfulness, memory loss, or confusion while taking statins. These reports are considered rare, and reported cognitive symptoms have generally been nonserious and reversible after discontinuation in reported cases.
That doesn’t mean every memory problem is caused by atorvastatin. If you notice a significant change, speak with your clinician rather than stopping the medicine yourself.
10. Changes in blood sugar
Atorvastatin can increase HbA1c and fasting blood glucose levels. Statins as a group can modestly increase the risk of developing type 2 diabetes, particularly in people who already have risk factors such as prediabetes or metabolic syndrome.
11. Abnormal liver enzymes
Blood tests may show increased liver enzymes during treatment. Actual serious liver injury is very rare, but unexplained fatigue, loss of appetite, upper-right abdominal pain, dark urine, or yellowing of the skin or eyes should be evaluated promptly.
12. Fatigue
Fatigue has been reported after atorvastatin entered widespread clinical use. If new, persistent exhaustion develops, don’t automatically assume it’s the medication—other causes should also be considered.
13. Tendon problems
Tendon rupture has been reported after atorvastatin use, although this is uncommon and a causal relationship isn’t always certain.
14. Nerve symptoms
Peripheral neuropathy, which can involve sensations such as tingling, numbness, or altered sensation, has been reported as an uncommon post-marketing reaction.
15. Rare immune-related muscle disease
A particularly unusual complication is immune-mediated necrotizing myopathy (IMNM). Unlike ordinary statin-associated muscle symptoms, this autoimmune muscle disorder can cause persistent, significant weakness and may continue even after the medication is stopped.
