Abstract: The invention relates to a method for determining a finished medicinal product, having the following steps: providing a finished medicinal product to be determined in closed primary packaging; measuring an NIR measurement spectrum for the finished medicinal product to be determined through the closed primary packaging; comparing the NIR measurement spectrum with an NIR reference spectrum, which is associated with a medicinal product or an active ingredient of a medicinal product; and determining that the finished medicinal product to be determined contains the medicinal product or the medicinal product active ingredient when the NIR measurement spectrum and the NIR reference spectrum correspond within a margin for error. The invention further relates to a device for determining a finished medicinal product.