The International Drug Collection serves as a supplement to the US Drug Collection in that it includes 400 drugs that are or have been marketed in Europe and/or Asia but have not been introduced in the US. Such compounds have received INN, BAN and/or JAN designations, and are listed in the Index Nominum, the International Drug Directory. The collection is available in 96 well microplates as10mM DMSO solutions or as 5mg solid samples in glass vials.