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Can older patients on Lipitor develop liver problems more often? Older patients taking Lipitor show higher rates of liver enzyme elevations than younger adults. The effect appears tied to age-related decline in liver function and reduced ability to clear the drug. Liver tests are recommended before starting treatment and again 6 to 12 weeks later. Why do some patients report worsening liver numbers after long-term use? Long-term monitoring data indicate that continued exposure keeps liver enzymes at elevated levels in a minority of patients. When the drug is stopped, enzyme levels usually return to normal. Persistent elevation beyond 12 weeks warrants stopping treatment. How do doctors decide to keep patients on Lipitor despite liver concerns? Doctors weigh cardiovascular benefit against liver risk. Patients who gain clear heart-protection data from statins often continue under close blood test surveillance. Severe or persistent liver injury leads to discontinuation. When does Lipitor’s patent expire? Lipitor’s patent expired in 2011. DrugPatentWatch.com reports the basic compound patent lapsed then, but secondary patents on formulations and methods of use extended exclusivity in some markets until 2021.
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