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  1. Article ; Online: Extrapolation of Efficacy from Adults to Pediatric Patients of Drugs for Treatment of Partial Onset Seizures: A Regulatory Perspective.

    Mehrotra, Shailly / Bhattaram, Atul / Krudys, Kevin / Bewernitz, Michael / Uppoor, Ramana / Mehta, Mehul / Liu, Tao / Sheridan, Philip / Hershkowitz, Norman / Kozauer, Nicholas / Bastings, Eric / Dunn, Billy / Men, Angela Yuxin

    Clinical pharmacology and therapeutics

    2022  Volume 112, Issue 4, Page(s) 853–863

    Abstract: The US Food and Drug Administration (FDA) has concluded that the efficacy of drugs approved for the treatment of partial onset seizures (POS) in adults can be extrapolated to pediatric patients 1 month of age and above and that independent efficacy ... ...

    Abstract The US Food and Drug Administration (FDA) has concluded that the efficacy of drugs approved for the treatment of partial onset seizures (POS) in adults can be extrapolated to pediatric patients 1 month of age and above and that independent efficacy trials in this pediatric population are no longer needed. This paper focuses on the dosing, pharmacokinetic (PK), exposure-response, and clinical information that were leveraged from the approved drugs for the treatment of POS to conduct analyses that supported extrapolation of efficacy in pediatric patients. Clinical data from trials for eight drugs (levetiracetam, oxcarbazepine, topiramate, lamotrigine, gabapentin, perampanel, tiagabine, and vigabatrin) approved in both adults and pediatric patients for the treatment of POS were analyzed. Comparisons of exposures at approved doses, placebo response, and model-based exposure-response relationships were performed. Based on disease similarity, similar response to intervention, and similar exposure-response relationships in adults and pediatric patients, it was concluded that extrapolation of efficacy in pediatric patients aged 1 month and above is acceptable. PK analysis to determine pediatric dose and regimens that provide drug exposure similar to that known to be effective in adult patients with POS will be required, along with long-term open-label safety data in pediatric patients.
    MeSH term(s) Adult ; Anticonvulsants/adverse effects ; Anticonvulsants/pharmacokinetics ; Child ; Humans ; Lamotrigine/therapeutic use ; Levetiracetam/therapeutic use ; Pharmaceutical Preparations ; Seizures/chemically induced ; Seizures/drug therapy ; United States
    Chemical Substances Anticonvulsants ; Pharmaceutical Preparations ; Levetiracetam (44YRR34555) ; Lamotrigine (U3H27498KS)
    Language English
    Publishing date 2022-07-03
    Publishing country United States
    Document type Journal Article
    ZDB-ID 123793-7
    ISSN 1532-6535 ; 0009-9236
    ISSN (online) 1532-6535
    ISSN 0009-9236
    DOI 10.1002/cpt.2681
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Pharmacometric Bridging Approach for U.S. Food and Drug Administration Approval and Identification of Topiramate Dosing Regimen for Pediatric Patients 2-9 Years of Age With Epilepsy.

    Marathe, Anshu / Liu, Chao / Kapcala, Leonard P / Hershkowitz, Norman / Men, Angela / Uppoor, Ramana / Mehta, Mehul / Wang, Yaning

    Journal of pharmaceutical sciences

    2018  Volume 108, Issue 4, Page(s) 1598–1603

    Abstract: This study was performed to identify an efficacious dosing regimen for U.S. Food and Drug Administration approval of topiramate for initial monotherapy in pediatric patients aged 2-9 years diagnosed with partial onset seizures and primary generalized ... ...

    Abstract This study was performed to identify an efficacious dosing regimen for U.S. Food and Drug Administration approval of topiramate for initial monotherapy in pediatric patients aged 2-9 years diagnosed with partial onset seizures and primary generalized tonic-clonic seizures using a pharmacometric bridging approach. The approval of topiramate in monotherapy of epilepsy for adult and pediatric patients (10-15 years) was based on efficacy and safety data from clinical trials. Our analysis showed that exposure-response relationship was similar between adult and pediatric patients (6-15 years) treated with topiramate as monotherapy for epilepsy. Specific dosing in pediatric patients 2-9 years of age was derived and included in the simulations by matching predicted exposures in pediatric patients (2-9 years) to a range of exposures observed in adult and pediatric patients (6-9 years) in a previously conducted clinical trial. The analysis allowed for U.S. Food and Drug Administration approval of topiramate for initial monotherapy in pediatric patients (2-9 years).
    MeSH term(s) Adolescent ; Age Factors ; Anticonvulsants/administration & dosage ; Anticonvulsants/adverse effects ; Anticonvulsants/pharmacokinetics ; Child ; Child, Preschool ; Clinical Trials as Topic ; Computer Simulation ; Drug Administration Schedule ; Drug Approval ; Epilepsy/blood ; Epilepsy/drug therapy ; Female ; Humans ; Male ; Models, Biological ; Time Factors ; Topiramate/administration & dosage ; Topiramate/adverse effects ; Topiramate/pharmacokinetics ; Treatment Outcome ; United States ; United States Food and Drug Administration
    Chemical Substances Anticonvulsants ; Topiramate (0H73WJJ391)
    Language English
    Publishing date 2018-11-20
    Publishing country United States
    Document type Journal Article
    ZDB-ID 3151-3
    ISSN 1520-6017 ; 0022-3549
    ISSN (online) 1520-6017
    ISSN 0022-3549
    DOI 10.1016/j.xphs.2018.11.027
    Database MEDical Literature Analysis and Retrieval System OnLINE

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