The document provides an overview of the International Conference on Harmonisation (ICH), which brings together regulatory authorities and pharmaceutical experts from Europe, Japan, and the United States to discuss scientific and technical aspects of drug registration. The ICH was established in 1990 to improve efficiency and make new drugs available more quickly by harmonizing technical requirements for registration. It covers topics related to quality, safety, efficacy, and multidisciplinary issues. The overview describes the ICH parties and objectives, and provides examples of guidelines developed within each of the four main categories.