Kyowa Parkinson’s Therapy NDA Resubmitted

FDA has accepted for review a Kyowa Hakko Kirin resubmitted NDA for KW-6002 (istradefylline), an investigational selective adenosine A2A receptor antagonist for use as adjunctive treatment to levodopa/carbidopa in adult patients with Parkinson’s disease experiencing “off” episodes. The agency 2/2018 rejected the submission, citing concern about whether "efficacy findings support clinical utility of istradefylline," according to the company. The agency also requested an overall summary of nonclinical mineralization findings. Additionally, it asked for clinical pharmacology follow-up information. FDA has given the NDA a user fee review action target of 8/27.

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Guide on Biosimilar Postapproval Manufacturing Changes

FDA has released a final guidance entitled “Postapproval Manufacturing Changes to Biosimilar and Interchangeable Biosimilar Products — Questions and Answers.” The document explains how manufacturers should document and report changes to approved biosimilars, including changes involving manufacturing processes, production facilities, dosage forms and strengths. Regarding information required for postapproval manufacturing changes,