In 2010, the Ministry of Health, Labour and Welfare launched a committee, “Evaluation Committee on Unapproved or Off-label Drugs with High Medical Needs” to accept requests for development of unapproved or off-label drugs in Japan and encourage pharmaceutical companies to develop them. Of the requests submitted so far, about one-fifth have been judged as drugs without high medical needs, which resulted in no action. The purpose of this study was to clarify the eligibility requirements for drugs judged as those with high medical need (“necessary standard”) and also to highlight the important role of the committee. Of the fourth request, 102 drugs that had already been evaluated by August 30, 2023, were selected as study subject (1). Of these, 91 drugs submitted under the category of unapproved drugs and off-label drugs were selected as study subject (2). Information of explanatory variables was extracted from the request form, and logistic regression analysis was conducted with the necessary standard as a response variable. Presence of randomized controlled trial data, requests submitted by relevant academic societies, and requests submitted for the second or more times in the study subject (1), and degree of recommendation in overseas guidelines in the study subject (2) showed significant associations with the necessary standard. When submitting requests to the committee, it is recommended to collaborate with academic societies and carefully check the existence of literature with a high evidence level. The committee is expected to continuously play a crucial role in enabling patients to quickly access insurance-covered medications by utilizing existing scientific data.
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