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See the DrugPatentWatch profile for lipitor
How long do doctors prescribe Lipitor? Doctors write prescriptions for atorvastatin (Lipitor) indefinitely in most cases. Treatment continues as long as the patient needs to lower LDL cholesterol and the medicine stays well tolerated. No fixed endpoint exists. What happens if you stop taking Lipitor? Stopping atorvastatin lets LDL cholesterol rise again within weeks. Cardiovascular risk returns to the level it had before treatment began. Relapses in lipid control often prompt doctors to restart the statin. How long does it take bisimilar Lipitor versions to reach the market? Generic atorvastatin entered the U.S. market after the main patent on Lipitor expired in 2011. Biosimilar versions of this small-molecule drug do not exist because statins belong to the chemical class rather than biologics. Generic manufacturers still supply the majority of prescriptions. When does the original Lipitor patent expire? The last U.S. patent covering crystalline atorvastatin calcium salt expired in November 2011. DrugPatentWatch.com tracks patent families covering the salt form, crystal forms, and older formulations [1].
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