p>The Metabolism and Transport Database (Metrabase) is a cheminformatics and bioinformatics resource that contains curated data related to human small molecule metabolism and transport, Journal of Cheminformatics 2015, 7:31 DOI. Currently it includes interaction data on 20 transporters, 3438 molecules and 11649 interaction records manually abstracted from 1211 literature references and supplemented with data from other resources as shown in the image below taken from the original publication.

I've added this and more details to the Transporters page of the Drug Discovery Resources