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      Generic Drugs in the United States: Policies to Address Pricing and Competition

      1 , 2 , 3 , 4 , 5
      Clinical Pharmacology & Therapeutics
      Wiley

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          Abstract

          The cost of prescription drugs in the U.S. continues to be a source of concern for patients, caregivers, and policymakers. Drug prices typically decline rapidly once generic drugs receive U.S. Food and Drug Administration (FDA) approval and enter the market, but the past decade has witnessed rising costs and shortages of generic drugs. We describe the strategies employed by brand-name manufacturers to undermine generic competition and the reasons underlying the price increases of off-patent drugs, some of which continue to lack any competition from generic versions, and others that have increased in price despite having generic versions. We discuss the FDA’s role in addressing drug prices and promoting competition, including recent agency policies to modify its process of reviewing generic drug applications and prioritize applications for off-patent drugs with few competitors. We also examine proposed policy solutions and research areas that could help address the price increases of off-patent drugs.

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          Most cited references43

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          The implications of choice: prescribing generic or preferred pharmaceuticals improves medication adherence for chronic conditions.

          A large proportion of Americans are enrolled in 3-tier pharmacy benefit plans. We studied whether patients enrolled in such plans who receive generic or preferred brand-name agents when initiating chronic therapy were more adherent to treatment than those who received nonpreferred brand-name medications. We analyzed pharmacy claims filled between October 1, 2001, and October 1, 2003, from a large health plan for 6 classes of chronic medications: 3-hydroxy-3-methylglutaryl coenzyme A reductase inhibitors, calcium channel blockers, oral contraceptives, orally inhaled corticosteroids, angiotensin receptor blockers, and angiotensin-converting enzyme inhibitors. We measured adherence as the proportion of days covered (PDC) in each drug class during the first year of therapy. We evaluated how the formulary status of the initial prescription (generic, preferred, or nonpreferred) influenced PDC and adequate adherence, defined as PDC greater than 80%, over the subsequent year. A total of 7532 new prescriptions were filled in 1 of the classes evaluated: 1747 (23.2%) for nonpreferred medications, 4376 (58.1%) for preferred drugs, and 1409 (18.7%) for generic drugs. After controlling for patient sociodemographic characteristics and drug class, PDC was 12.6% greater for patients initiated on generic medications vs nonpreferred medications (58.8% vs 52.2%; P<.001). The PDC was 8.8% greater for patients initiated on preferred vs nonpreferred medications (56.8% vs 52.2%; P<.001). Patients initiated on generic and preferred medications had 62% and 30% greater odds, respectively, of achieving adequate adherence compared with those who received nonpreferred medications. In 3-tier pharmacy benefit plans, prescribing generic or preferred medications within a therapeutic class is associated with improvements in adherence to therapy.
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            Comparative effectiveness of generic and brand-name statins on patient outcomes: a cohort study.

            Statins are effective in preventing cardiovascular events, but patients do not fully adhere to them.
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              Prices of Generic Drugs Associated with Numbers of Manufacturers

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                Author and article information

                Journal
                Clinical Pharmacology & Therapeutics
                Clin. Pharmacol. Ther.
                Wiley
                0009-9236
                1532-6535
                September 16 2018
                February 2019
                January 10 2019
                February 2019
                : 105
                : 2
                : 329-337
                Affiliations
                [1 ]Department of MedicineJohns Hopkins Hospital and Johns Hopkins School of Medicine Baltimore Maryland USA
                [2 ]Division of Health Care Policy and ResearchRobert D. and Patricia E. Kern Center for the Science of Health Care DeliveryMayo Clinic Rochester Minnesota USA
                [3 ]Department of MedicineSection of General Internal MedicineYale University School of Medicine New Haven Connecticut USA
                [4 ]Department of Health Policy and ManagementYale University School of Public Health New Haven Connecticut USA
                [5 ]Center for Outcomes Research and EvaluationYale–New Haven Hospital New Haven Connecticut USA
                Article
                10.1002/cpt.1314
                6355356
                30471089
                45b909ae-3c9a-4d0a-bf7e-61e5ecd05f53
                © 2019

                http://onlinelibrary.wiley.com/termsAndConditions#vor

                http://doi.wiley.com/10.1002/tdm_license_1.1

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