Statins have a reputation for damaging the liver that is largely out of proportion to the evidence. What they commonly do is raise liver enzyme readings on a blood test. What they rarely do is cause actual liver injury. Those two things are frequently confused, including by people who have been told their liver tests are raised.
Common side effects during long-term use
A mild rise in liver enzymes is common, usually appears in the first months, and often settles without any change to treatment. It typically causes no symptoms at all and is found only because a blood test was done.
A raised enzyme reading is not the same as liver damage. Enzymes leak into the blood for many reasons, including alcohol, fatty liver, other medicines, recent illness and even vigorous exercise. A modest rise on a statin is usually monitored rather than acted on.
Serious statin-related liver injury is rare. This is why routine liver testing on statins is now generally less frequent than it once was, rather than more.
Serious or persistent symptoms to discuss with a clinician
Contact a doctor promptly for the symptoms that suggest actual liver problems, rather than a number on a report:
- Yellowing of the eyes or skin
- Dark urine or pale stools
- Persistent nausea or vomiting
- Unusual tiredness or weakness
- Pain under the right ribs
- Itching without a rash
These need assessment. A raised enzyme level with none of these usually does not need you to do anything beyond following the monitoring plan.
Dose changes, missed doses and monitoring tests
Liver tests are usually checked before starting and again within the first few months. After that, routine repeat testing is often not required unless there is a reason.
Do not stop your statin because a liver reading is mildly raised. Ask what the number was, how far outside the range it sits, and what the plan is. Small rises are commonly monitored and frequently settle; larger ones may prompt a dose change, a switch, or investigation of another cause.
Non-alcoholic fatty liver disease is common and is itself a frequent reason for mildly raised enzymes. Having it does not automatically rule out a statin; people with it often still benefit.
Interactions with OTC medicines and supplements
- Alcohol, the most common additional factor in raised readings.
- Paracetamol at the upper end of the range, particularly with regular alcohol.
- Supplements associated with liver injury, including high-dose turmeric and green tea extract. If enzymes are raised, these are worth reviewing before blaming the statin. See supplements causing liver problems.
- Some antibiotics and antifungals, which raise statin levels.
What to ask your doctor before changing treatment
- How raised is my reading, and does it actually need action?
- Could something other than the statin explain it?
- Should it be rechecked, and when?
- Do I need to change dose or statin, or continue as I am?
- Which symptoms should make me contact you?
Related chronic medication guides
- Cholesterol medication side effects
- Chronic medication side effects
- Managing chronic medication side effects
- Should I stop my chronic medication
- Report a side effect in South Africa
See also statin side effects and medicines causing liver problems.
Medical Disclaimer: This content is for informational and educational purposes only and does not constitute medical diagnosis, prescription, or professional advice. Always read the patient information leaflet and consult a qualified doctor or pharmacist regarding any medicine or health concern.