title: Current opinion: safety evaluation of drug metabolites in development of pharmaceuticals.
abstract: Safety assessment of drug metabolites in the development of pharmaceuticals was discussed in January 2007 at the kick-off meeting of a "Drug Evaluation Forum", with reference to the views of clinicians and other academic representatives. Safety evaluation of metabolites cannot readily be based on a single theoretical framework, and basically a case-by-case approach is called for. These evaluations should be performed precisely and an accurate profile secured taking into account adverse reactions that are unpredictable from the parent compound administered in clinical studies and any signs or symptoms that may be associated with the metabolites. In addition, elimination of scientifically meaningless metabolite safety assessment studies is essential for prompt supply of high-quality drugs to the medical frontline. Preparation of an outline concept paper would be useful for achievement of shared understanding of issues of this type. Collective viewpoints obtained in this fashion are also relevant to the discussion on the need for guidance, and given a degree of flexibility may also be helpful for drug development and, in turn, society at large.
authors.affiliation: Japan Pharmaceutical Manufacturers Association, Drug Evaluation Committee, Non-clinical Evaluation Subcommittee, Tokyo, Japan. naitousn@otsukakj.co.jp
authors.forename: Shinsaku
authors.initials: S
authors.lastname: Naito
authors.forename: Shigeru
authors.initials: S
authors.lastname: Furuta
authors.forename: Takemi
authors.initials: T
authors.lastname: Yoshida
authors.forename: Mitsukazu
authors.initials: M
authors.lastname: Kitada
authors.forename: Osamu
authors.initials: O
authors.lastname: Fueki
authors.forename: Takashi
authors.initials: T
authors.lastname: Unno
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Ohno
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Onodera
authors.forename: Nobuyuki
authors.initials: N
authors.lastname: Kawamura
authors.forename: Misao
authors.initials: M
authors.lastname: Kurokawa
authors.forename: Fumio
authors.initials: F
authors.lastname: Sagami
authors.forename: Kazutoshi
authors.initials: K
authors.lastname: Shinoda
authors.forename: Takahiro
authors.initials: T
authors.lastname: Nakazawa
authors.forename: Tsuneyoshi
authors.initials: T
authors.lastname: Yamazaki
mesh_terms: D000818:Animals; D054316:Biomarkers, Pharmacological / Q000378:metabolism; D003257:Consumer Product Safety; D015195:Drug Design; D004341:Drug Evaluation / Q000379:methods* / Q000639:trends; D064420:Drug-Related Side Effects and Adverse Reactions / Q000139:chemically induced / Q000378:metabolism; D006801:Humans; D004364:Pharmaceutical Preparations / Q000378:metabolism
chemical_list: D054316:Biomarkers, Pharmacological; D004364:Pharmaceutical Preparations