The IUPHAR/BPS Guide to Pharmacology now requires all users to register and login in order to access the database.
This change is necessary so that we can collect accurate user access data, which helps us maintain GtoPdb as an open-access, freely available resource.
Commercial organisations that use GtoPdb must pay access-fees which support the maintenance, curation and sustainability of the resource. Please read our sustainability statement for more information.
If you have any questions about accessing GtoPdb, please get in touch with us. For more information on GtoPdb please see our about page.