• Clin. Pharmacol. Ther. · Feb 2010

    Delays in new drug applications in Japan and industrial R&D strategies.

    • Y Hirai, H Kinoshita, M Kusama, K Yasuda, Y Sugiyama, and S Ono.
    • Laboratory of Pharmaceutical Regulatory Sciences, Graduate School of Pharmaceutical Sciences, University of Tokyo, Tokyo, Japan.
    • Clin. Pharmacol. Ther. 2010 Feb 1; 87 (2): 212-8.

    AbstractThe gap between Japan and both the United States (US) and the European Union (EU) with regard to access to new drugs is becoming a major issue in Japan. We analyzed the time lags involved in new drug application (NDA) and biological license application submissions in Japan, the US, and the EU in order to identify the causes of delayed access. The time lag related to submission of applications ("submission lag") was longer for in-licensed products and for non-Japanese companies. Factors related to costs of clinical studies and potential volumes of sales were not associated with the submission lag. A bridging strategy (extrapolative use of foreign clinical data in the clinical data package based on International Conference on Harmonisation guideline E5) seemed to reduce submission lag, but the association between the two diminished when the cause-and-effect relationship was specifically investigated. These results suggest that multinational companies are likely to place more emphasis on the choice of development strategies that successfully lead to their goal rather than on direct costs and expected sales when deciding to introduce their pharmaceutical products in Japan. Our findings indicate that the clinical development guidances that helps pharmaceutical companies decide on investment and strategies are also the key to narrowing the gap in access to new drugs.

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