Profiles of Drug Substances, Excipients, and Related Methodology, Volume 45, presents comprehensive reviews of drug substances and additional materials, with critical review chapters that summarize information related to the characterization of drug substances and excipients. The series encompasses review articles, with this release focusing on Azilsartan Medoxomil, Piroxicam, Carbetapentane Citrate, Emtricitabine, Etrlotinib, Isotretinoin and Meloxicam.