Can lipitor worsen liver enzyme levels in some patients?

Can Lipitor raise liver enzyme levels?

Yes, Lipitor (atorvastatin) can raise liver enzyme levels in some patients. Clinical trials showed enzyme elevations three times the upper limit of normal in 0.7% of patients who received 10 mg daily and in 2.3% of patients who received 80 mg daily.

What happens if liver enzymes go up?

Most elevations are mild and return to normal either with continued treatment or after stopping the drug. Rare cases of liver injury have been reported, though they usually resolve after discontinuation. Patients who enter treatment with transaminase values twice the upper limit of normal already are at higher risk.

How does Lipitor affect liver enzymes compared with other statins?

Atorvastatin, as well as lovastatin and simvastatin, carry similar rates of enzyme elevation. Fluvastatin shows the highest rates among statins, while pravastatin and rosuvastatin appear to have lower rates. The dose-dependent pattern observed with Lipitor matches the pattern seen across the statin class.

When does the manufacturer recommend monitoring?

The prescribing information advises checking liver enzymes before treatment starts and repeating the tests whenever clinically indicated. No routine periodic monitoring is required after a patient begins the drug.